Give controls more width to avoid edge being clipped

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@46560 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/toolbar.cpp

@@ -704,6 +704,9 @@ static pascal OSStatus ControlToolbarItemHandler( EventHandlerCallRef inCallRef,
                                 sz = wxSize(0,0) ;
                         }
                             
+                        // Extra width to avoid edge of combobox being cut off
+                        sz.x += 3;
+                        
                         HISize min, max;
                         min.width = max.width = sz.x ;
                         min.height = max.height = sz.y ;