Provide shorter synonyms for wxEVT_XXX constants.

Use the same short names as are used by the event table macros for the event
type constants themselves. This makes them much more comfortable to use, e.g.
Bind(wxEVT_BUTTON) compared to Bind(wxEVT_COMMAND_BUTTON_CLICKED).

The old long names are still kept for backwards compatibility and shouldn't be
removed as it doesn't really cost anything to continue providing them, but all
new event types should only use the short versions.

Closes #10661.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73850 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/simplebook.h

@@ -27,8 +27,8 @@
     appearance of its own.
 
     There are also no special events, this class reuses
-    @c wxEVT_COMMAND_BOOKCTRL_PAGE_CHANGING and @c
-    wxEVT_COMMAND_BOOKCTRL_PAGE_CHANGED events for the events it generates if
+    @c wxEVT_BOOKCTRL_PAGE_CHANGING and @c
+    wxEVT_BOOKCTRL_PAGE_CHANGED events for the events it generates if
     the program calls SetSelection().
 
     @library{none}