Doc: correct descriptions (mainly operators)

Corrections:

- Copy-paste errors where descriptions were from other operators.
- Descriptions that only mentioned one direction/action when both apply.
- Descriptions referencing wrong element types.
- Improve unclear or oddly worded descriptions.
- Replace placeholder text.

Ref !154424

scripts/startup/bl_operators/uvcalc_lightmap.py

@@ -606,8 +606,8 @@ class LightMapPack(Operator):
     PREF_CONTEXT: bpy.props.EnumProperty(
         name="Selection",
         items=(
-            ('SEL_FACES', "Selected Faces", "Space all UVs evenly"),
-            ('ALL_FACES', "All Faces", "Average space UVs edge length of each loop"),
+            ('SEL_FACES', "Selected Faces", "Pack only selected faces"),
+            ('ALL_FACES', "All Faces", "Pack all faces in the mesh"),
         ),
     )
 

scripts/startup/bl_operators/view3d.py

@@ -86,7 +86,7 @@ class VIEW3D_OT_edit_mesh_extrude_move(Operator):
     bl_idname = "view3d.edit_mesh_extrude_move_normal"
 
     dissolve_and_intersect: BoolProperty(
-        name="dissolve_and_intersect",
+        name="Dissolve and Intersect",
         default=False,
         description="Dissolves adjacent faces and intersects new geometry",
     )

scripts/startup/bl_ui/generic_ui_list.py

@@ -227,8 +227,8 @@ class UILIST_OT_entry_move(GenericUIListOperator, Operator):
     direction: EnumProperty(
         name="Direction",
         items=(
-            ('UP', 'UP', 'UP'),
-            ('DOWN', 'DOWN', 'DOWN'),
+            ('UP', "Up", "Move the active entry up"),
+            ('DOWN', "Down", "Move the active entry down"),
         ),
         default='UP',
     )

source/blender/editors/curve/editcurve_pen.cc

@@ -1864,7 +1864,8 @@ void CURVE_OT_pen(wmOperatorType *ot)
   RNA_def_boolean(ot->srna, "delete_point", false, "Delete Point", "Delete an existing point");
   RNA_def_boolean(
       ot->srna, "insert_point", false, "Insert Point", "Insert Point into a curve segment");
-  RNA_def_boolean(ot->srna, "move_segment", false, "Move Segment", "Delete an existing point");
+  RNA_def_boolean(
+      ot->srna, "move_segment", false, "Move Segment", "Move an existing curve segment");
   RNA_def_boolean(
       ot->srna, "select_point", false, "Select Point", "Select a point or its handles");
   RNA_def_boolean(ot->srna, "move_point", false, "Move Point", "Move a point or its handles");

source/blender/editors/curves/intern/curves_pen.cc

@@ -1448,7 +1448,8 @@ void pen_tool_common_props(wmOperatorType *ot)
   RNA_def_boolean(ot->srna, "delete_point", false, "Delete Point", "Delete an existing point");
   RNA_def_boolean(
       ot->srna, "insert_point", false, "Insert Point", "Insert Point into a curve segment");
-  RNA_def_boolean(ot->srna, "move_segment", false, "Move Segment", "Delete an existing point");
+  RNA_def_boolean(
+      ot->srna, "move_segment", false, "Move Segment", "Move an existing curve segment");
   RNA_def_boolean(
       ot->srna, "select_point", false, "Select Point", "Select a point or its handles");
   RNA_def_boolean(ot->srna, "move_point", false, "Move Point", "Move a point or its handles");

source/blender/editors/io/io_cache.cc

@@ -317,7 +317,7 @@ void CACHEFILE_OT_layer_move(wmOperatorType *ot)
                layer_slot_move,
                0,
                "Direction",
-               "Direction to move the active vertex group towards");
+               "Direction to move the active layer towards");
 }
 
 }  // namespace blender

source/blender/editors/mask/mask_add.cc

@@ -837,8 +837,15 @@ static wmOperatorStatus primitive_add_invoke(bContext *C,
 
 static void define_primitive_add_properties(wmOperatorType *ot)
 {
-  RNA_def_float(
-      ot->srna, "size", 100, -FLT_MAX, FLT_MAX, "Size", "Size of new circle", -FLT_MAX, FLT_MAX);
+  RNA_def_float(ot->srna,
+                "size",
+                100,
+                -FLT_MAX,
+                FLT_MAX,
+                "Size",
+                "Size of new primitive",
+                -FLT_MAX,
+                FLT_MAX);
   RNA_def_float_vector(ot->srna,
                        "location",
                        2,
@@ -846,7 +853,7 @@ static void define_primitive_add_properties(wmOperatorType *ot)
                        -FLT_MAX,
                        FLT_MAX,
                        "Location",
-                       "Location of new circle",
+                       "Location of new primitive",
                        -FLT_MAX,
                        FLT_MAX);
 }

source/blender/editors/mesh/editmesh_select.cc

@@ -1611,9 +1611,9 @@ void MESH_OT_select_mode(wmOperatorType *ot)
   PropertyRNA *prop;
 
   static const EnumPropertyItem actions_items[] = {
-      {0, "DISABLE", false, "Disable", "Disable selected markers"},
-      {1, "ENABLE", false, "Enable", "Enable selected markers"},
-      {2, "TOGGLE", false, "Toggle", "Toggle disabled flag for selected markers"},
+      {0, "DISABLE", false, "Disable", "Disable the selection mode"},
+      {1, "ENABLE", false, "Enable", "Enable the selection mode"},
+      {2, "TOGGLE", false, "Toggle", "Toggle the selection mode"},
       {0, nullptr, 0, nullptr, nullptr},
   };
 

source/blender/editors/mesh/editmesh_tools.cc

@@ -1707,7 +1707,7 @@ void MESH_OT_vert_connect_concave(wmOperatorType *ot)
   /* identifiers */
   ot->name = "Split Concave Faces";
   ot->idname = "MESH_OT_vert_connect_concave";
-  ot->description = "Make all faces convex";
+  ot->description = "Split concave faces by connecting vertices to make them convex";
 
   /* API callbacks. */
   ot->exec = edbm_vert_connect_concave_exec;

source/blender/editors/pointcloud/intern/operators.cc

@@ -130,7 +130,7 @@ static void POINTCLOUD_OT_select_all(wmOperatorType *ot)
 {
   ot->name = "(De)select All";
   ot->idname = "POINTCLOUD_OT_select_all";
-  ot->description = "(De)select all point cloud";
+  ot->description = "(De)select all points";
 
   ot->exec = select_all_exec;
   ot->poll = editable_pointcloud_poll;

source/blender/editors/render/render_shading.cc

@@ -3157,7 +3157,7 @@ void TEXTURE_OT_slot_paste(wmOperatorType *ot)
   /* identifiers */
   ot->name = "Paste Texture Slot Settings";
   ot->idname = "TEXTURE_OT_slot_paste";
-  ot->description = "Copy the texture settings and nodes";
+  ot->description = "Paste the texture settings and nodes";
 
   /* API callbacks. */
   ot->exec = paste_mtex_exec;

source/blender/editors/space_clip/tracking_ops_orient.cc

@@ -562,8 +562,8 @@ static wmOperatorStatus set_axis_exec(bContext *C, wmOperator *op)
 void CLIP_OT_set_axis(wmOperatorType *ot)
 {
   static const EnumPropertyItem axis_actions[] = {
-      {0, "X", 0, "X", "Align bundle align X axis"},
-      {1, "Y", 0, "Y", "Align bundle align Y axis"},
+      {0, "X", 0, "X", "Align bundle to X axis"},
+      {1, "Y", 0, "Y", "Align bundle to Y axis"},
       {0, nullptr, 0, nullptr, nullptr},
   };
 

source/blender/editors/space_image/image_ops.cc

@@ -942,7 +942,7 @@ void IMAGE_OT_view_cursor_center(wmOperatorType *ot)
 
   /* identifiers */
   ot->name = "Cursor To Center View";
-  ot->description = "Set 2D Cursor To Center View location";
+  ot->description = "Set 2D cursor to center view location";
   ot->idname = "IMAGE_OT_view_cursor_center";
 
   /* API callbacks. */
@@ -1798,7 +1798,7 @@ void IMAGE_OT_match_movie_length(wmOperatorType *ot)
 {
   /* identifiers */
   ot->name = "Match Movie Length";
-  ot->description = "Set image's user's length to the one of this video";
+  ot->description = "Set the image's frame range to match the video's duration";
   ot->idname = "IMAGE_OT_match_movie_length";
 
   /* API callbacks. */

source/blender/editors/space_outliner/outliner_edit.cc

@@ -305,7 +305,7 @@ void OUTLINER_OT_item_openclose(wmOperatorType *ot)
 {
   ot->name = "Open/Close";
   ot->idname = "OUTLINER_OT_item_openclose";
-  ot->description = "Toggle whether item under cursor is enabled or closed";
+  ot->description = "Toggle whether item under cursor is open or closed";
 
   ot->invoke = outliner_item_openclose_invoke;
   ot->modal = outliner_item_openclose_modal;

source/blender/editors/space_sequencer/sequencer_edit.cc

@@ -3014,7 +3014,7 @@ void SEQUENCER_OT_strip_jump(wmOperatorType *ot)
   /* Identifiers. */
   ot->name = "Jump to Strip";
   ot->idname = "SEQUENCER_OT_strip_jump";
-  ot->description = "Move frame to previous edit point";
+  ot->description = "Move frame to next or previous edit point";
 
   /* API callbacks. */
   ot->exec = sequencer_strip_jump_exec;

source/blender/editors/undo/ed_undo.cc

@@ -753,7 +753,7 @@ void ED_OT_undo_history(wmOperatorType *ot)
 {
   /* identifiers */
   ot->name = "Undo History";
-  ot->description = "Redo specific action in history";
+  ot->description = "Undo or redo specific action in history";
   ot->idname = "ED_OT_undo_history";
 
   /* API callbacks. */

source/blender/editors/uvedit/uvedit_ops.cc

@@ -830,7 +830,7 @@ static void UV_OT_arrange_islands(wmOperatorType *ot)
        "MAX",
        0,
        "Max",
-       "Align the islands to the left side of the island"},
+       "Align the islands to the max side of the island"},
       {int(UVAlignIslandMode::Center),
        "CENTER",
        0,

source/blender/makesrna/intern/rna_ui.cc

@@ -1878,7 +1878,7 @@ static void rna_def_panel(BlenderRNA *brna)
 
   prop = RNA_def_property(srna, "text", PROP_STRING, PROP_NONE);
   RNA_def_property_string_sdna(prop, nullptr, "drawname");
-  RNA_def_property_ui_text(prop, "Text", "XXX todo");
+  RNA_def_property_ui_text(prop, "Text", "Override for the panel label in the UI");
 
   prop = RNA_def_property(srna, "custom_data", PROP_POINTER, PROP_NONE);
   RNA_def_property_struct_type(prop, "Constraint");

source/blender/windowmanager/intern/wm_operator_props.cc

@@ -141,7 +141,7 @@ void WM_operator_properties_filesel(wmOperatorType *ot,
   prop = RNA_def_boolean(ot->srna,
                          "filter_backup",
                          (filter & FILE_TYPE_BLENDER_BACKUP) != 0,
-                         "Filter .blend files",
+                         "Filter backup .blend files",
                          "");
   RNA_def_property_flag(prop, PROP_HIDDEN | PROP_SKIP_SAVE);
   prop = RNA_def_boolean(