Merge branch 'updateui-ischeckable'

Add a flag to wxUpdateUIEvent to tell if the item supports the check
action.

See https://github.com/wxWidgets/wxWidgets/pull/2027

src/common/menucmn.cpp

@@ -617,6 +617,9 @@ void wxMenuBase::UpdateUI(wxEvtHandler* source)
             wxUpdateUIEvent event(itemid);
             event.SetEventObject( this );
 
+            if ( !item->IsCheckable() )
+                event.DisallowCheck();
+
             if ( source->ProcessEvent(event) )
             {
                 // if anything changed, update the changed attribute

src/common/tbarbase.cpp

@@ -739,6 +739,9 @@ void wxToolBarBase::UpdateWindowUI(long flags)
         wxUpdateUIEvent event(toolid);
         event.SetEventObject(this);
 
+        if ( !tool->CanBeToggled() )
+            event.DisallowCheck();
+
         if ( evtHandler->ProcessEvent(event) )
         {
             if ( event.GetSetEnabled() )