change python scripts so modules which register with blender have a register() function rather then making import automatically run the register functions (generally considered bad practice by python people)

release/scripts/ui/properties_data_mesh.py

@@ -304,15 +304,28 @@ class DATA_PT_vertex_colors(DataButtonsPanel):
         if lay:
             layout.prop(lay, "name")
 
-bpy.types.register(MESH_MT_vertex_group_specials)
-bpy.types.register(MESH_MT_shape_key_specials)
 
-bpy.types.register(DATA_PT_context_mesh)
-bpy.types.register(DATA_PT_normals)
-bpy.types.register(DATA_PT_settings)
-bpy.types.register(DATA_PT_vertex_groups)
-bpy.types.register(DATA_PT_shape_keys)
-bpy.types.register(DATA_PT_uv_texture)
-bpy.types.register(DATA_PT_vertex_colors)
+classes = [
+    MESH_MT_vertex_group_specials,
+    MESH_MT_shape_key_specials,
 
-bpy.types.register(DATA_PT_custom_props_mesh)
+    DATA_PT_context_mesh,
+    DATA_PT_normals,
+    DATA_PT_settings,
+    DATA_PT_vertex_groups,
+    DATA_PT_shape_keys,
+    DATA_PT_uv_texture,
+    DATA_PT_vertex_colors,
+
+    DATA_PT_custom_props_mesh]
+
+
+def register():
+    register = bpy.types.register
+    for cls in classes:
+        register(cls)
+
+def unregister():
+    unregister = bpy.types.unregister
+    for cls in classes:
+        unregister(cls)