+- Moved wxApp::SendIdleEvents and wxApp::ProcessIdle into common code.
+- wxWindow::OnInternalIdle is now used in all ports, and ensures that
+ user OnIdle events do not interfere with crucial internal processing.
+- wxWindow::UpdateWindowUI is now a documented function that
+ sends wxUpdateUIEvents, and can be overridden. It has a helper function
+ DoUpdateWindowUI for taking appropriate wxUpdateUIEvent action.
+- Added functions to wxUpdateUIEvent: Set/GetMode, Set/GetUpdateInterval,
+ CanUpdate, to assist with optimising update event frequency.
+- Added functions to wxIdleEvent: Set/GetMode, CanSend, to
+ determine whether a window should receive idle events.
+- Added wxWS_EX_PROCESS_IDLE, wxWS_EX_PROCESS_UI_UPDATES window
+ styles for use with conservative idle and update event modes.
+- wxMSW and wxGTK now send menu update events only when a menu is
+ about to be used.
+- improved event processing performance (Hans Van Leemputten)