Reverted to old wxPG_AUTO_SORT behavior in which only root properties and immediate children of categories are (automatically) sorted; Added Sort flags; Applied slight optimization when sorting on propgridmanager page change

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57975 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/propgrid/propgriddefs.h

@@ -387,7 +387,12 @@ wxPG_INC_ATTRIBUTES               = 0x00000040,
 wxPG_RECURSE_STARTS               = 0x00000080,
 
 /** Force value change. */
-wxPG_FORCE                        = 0x00000100
+wxPG_FORCE                        = 0x00000100,
+
+/** Only sort categories and their immediate children.
+    Sorting done by wxPG_AUTO_SORT option uses this.
+*/
+wxPG_SORT_TOP_LEVEL_ONLY          = 0x00000200
 
 };