Do proper cleanup of event handlers in wxWebKitCtrl and wxMacUnicodeTextCtrl, and unset the window focus when destroying a top level window to ensure that controls do not receive events after the wx portion of the control has been destroyed.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@56767 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/textctrl.cpp

@@ -1393,13 +1393,14 @@ bool wxMacUnicodeTextControl::Create( wxTextCtrl *wxPeer,
 
     InstallControlEventHandler( m_controlRef , GetwxMacUnicodeTextControlEventHandlerUPP(),
                                 GetEventTypeCount(unicodeTextControlEventList), unicodeTextControlEventList, this,
-                                NULL);
+                                (EventHandlerRef*) &m_macTextCtrlEventHandler);
                                 
     return true;
 }
 
 wxMacUnicodeTextControl::~wxMacUnicodeTextControl()
 {
+    ::RemoveEventHandler((EventHandlerRef) m_macTextCtrlEventHandler);
 }
 
 void wxMacUnicodeTextControl::VisibilityChanged(bool shown)