Fix T53678: Smart Project UV margin ignores units

release/scripts/startup/bl_operators/uvcalc_smart_project.py

@@ -1067,6 +1067,7 @@ class SmartProject(Operator):
     island_margin = FloatProperty(
             name="Island Margin",
             description="Margin to reduce bleed from adjacent islands",
+            unit='LENGTH', subtype='DISTANCE',
             min=0.0, max=1.0,
             default=0.0,
             )