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/html/htmlctrl/webkit/webkit.mm

@@ -468,7 +468,16 @@ bool wxWebKitCtrl::Create(wxWindow *parent,
 
 wxWebKitCtrl::~wxWebKitCtrl()
 {
-
+    MyFrameLoadMonitor* myFrameLoadMonitor = [m_webView frameLoadDelegate];
+    MyPolicyDelegate* myPolicyDelegate = [m_webView policyDelegate];
+    [m_webView setFrameLoadDelegate: nil];
+    [m_webView setPolicyDelegate: nil];
+    
+    if (myFrameLoadMonitor)
+        [myFrameLoadMonitor release];
+        
+    if (myPolicyDelegate)
+        [myPolicyDelegate release];
 }
 
 // ----------------------------------------------------------------------------