applications: Allow disabling category hover

When disabling the categories hover option, the code ignores the setting
and continues filtering on focus. Moving the focus event handler inside
the option conditional fixes the behaviour.

mate_menu/plugins/applications.py

@@ -1454,11 +1454,11 @@ def updateBoxes( self, menu_has_changed ):
                             startId = item["button"].connect( "enter", self.StartFilter, item["filter"] )
                             stopId = item["button"].connect( "leave", self.StopFilter )
                             item["button"].mouseOverHandlerIds = ( startId, stopId )
+                            item["button"].connect( "focus-in-event", self.categoryBtnFocus, item["filter"] )
                         else:
                             item["button"].mouseOverHandlerIds = None
 
                         item["button"].connect( "clicked", self.FilterAndClear, item["filter"] )
-                        item["button"].connect( "focus-in-event", self.categoryBtnFocus, item["filter"] )
                         item["button"].show()
 
                         self.categoryList.append( item )