Added automatic language switching option to debugger settings

Additionally, hiding of debugger menu entries was done as most of
them are irrelevant for QML debugging.

src/plugins/debugger/debuggeractions.h

@@ -136,7 +136,10 @@ enum DebuggerActionCode
     SelectedPluginBreakpointsPattern,
     UsePreciseBreakpoints,
     BreakOnThrow,
-    BreakOnCatch
+    BreakOnCatch,
+
+    // UI/Language switching
+    SwitchLanguageAutomatically
 };
 
 // singleton access