add wxShowEvent::IsShown() and wxIconizeEvent::IsIconized() instead of (now deprecated) GetShow() and Iconized() respectively (#978)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54320 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/toplevel.h

@@ -132,7 +132,7 @@ public:
         @param iconize
             If @true, iconizes the window; if @false, shows and restores it.
 
-        @see IsIconized(), Maximize().
+        @see IsIconized(), Maximize(), wxIconizeEvent.
     */
     void Iconize(bool iconize);