debugger: fix translation contexts

* add a few Q_OBJECT
* change DebuggerRunControl::tr() to DebuggerPlugin::tr()

Change-Id: I7ed973ea71b3492e91b45784595d9471587f72ea
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

src/plugins/debugger/snapshotwindow.h

@@ -58,6 +58,7 @@ private:
 
 class SnapshotWindow : public BaseWindow
 {
+    Q_OBJECT
 public:
     explicit SnapshotWindow(SnapshotHandler *handler)
         : BaseWindow(new SnapshotTreeView(handler))