more ui api changes.

- remove functions such as operator_int(), operator_enum(), operator_string
  this mixed with keyword arguments in a way that made them hard to read.
  Instead, have operator() always return properties rather then needing an argument.

- rename prop_pointer() --> prop_object(), pointer is more a C thing.

- missed item_enumR(), rename to prop_enum()

release/scripts/ui/properties_data_bone.py

@@ -174,7 +174,7 @@ class BONE_PT_relations(BoneButtonsPanel):
 
         if ob and pchan:
             col.label(text="Bone Group:")
-            col.prop_pointer(pchan, "bone_group", ob.pose, "bone_groups", text="")
+            col.prop_object(pchan, "bone_group", ob.pose, "bone_groups", text="")
 
         if wide_ui:
             col = split.column()
@@ -182,7 +182,7 @@ class BONE_PT_relations(BoneButtonsPanel):
         if context.bone:
             col.prop(bone, "parent", text="")
         else:
-            col.prop_pointer(bone, "parent", arm, "edit_bones", text="")
+            col.prop_object(bone, "parent", arm, "edit_bones", text="")
 
         sub = col.column()
         sub.active = (bone.parent is not None)