bmesh: being back bevel modifier from 2.62 stable.

this is no big improvement but at least its not a regression.

using the new operator for the bevel modifier can be enabled again be uncommenting a define.

release/scripts/startup/bl_ui/properties_data_modifier.py

@@ -124,9 +124,11 @@ class DATA_PT_modifiers(ModifierButtonsPanel, Panel):
         split.prop(md, "use_only_vertices")
 
         # -- new modifier only, this may be reverted in favor of 2.62 mod.
+        '''
         split = layout.split()
         split.prop(md, "use_even_offset")
         split.prop(md, "use_distance_offset")
+        '''
         # -- end
 
         layout.label(text="Limit Method:")