recategorize many misplaced classes; move lots of classes from miscellaneous [window] category to more specific categories; add the 'Book controls' and the 'Application and system configuration' class groups

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@59051 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/event.h

@@ -2562,7 +2562,7 @@ public:
     (unless the @c wxEVT_CATEGORY_THREAD is specified - which is never in wx code).
 
     @library{wxcore}
-    @category{events}
+    @category{events,threading}
 
     @see @ref overview_thread, wxEventLoopBase::YieldFor
 */