fix issues

- disable bmx import/export temporaryly
- optimize the ui display of importing/exporting. (use box to organize props)
- place button horizontally, not vertically in virtools material.
- disallow apply in legacy align if no axis selected.
- add applied step counter in legacy alignment.
- add feedback for reseting bme material/component. (add a message box to show success)

bbp_ng/OP_OBJECT_virtools_group.py

@@ -54,7 +54,8 @@ class BBP_OT_select_object_by_virtools_group(bpy.types.Operator, PROP_virtools_g
     def draw(self, context):
         layout = self.layout
         layout.label(text='Selection Mode')
-        layout.prop(self, 'selection_mode', expand = True)
+        sublayout = layout.column()    # make selection expand vertically, not horizontal.
+        sublayout.prop(self, 'selection_mode', expand = True)
 
         layout.separator()
         layout.label(text='Group Parameters')