Android Avd Dialog: Fix what the Name validator accepts

While at it, make non acceptable chars give better feedback.

Change-Id: I080f01592b2c8cbd6580734ca3e6fd46b9491106
Task-number: QTCREATORBUG-13589
Reviewed-by: BogDan Vatra <bogdan@kde.org>

src/libs/utils/tooltip/tooltip.h

@@ -82,6 +82,8 @@ public:
     static void hide();
     static bool isVisible();
 
+    static QPoint offsetFromPosition();
+
     // Helper to 'pin' (show as real window) a tooltip shown
     // using WidgetContent
     static bool pinToolTip(QWidget *w, QWidget *parent);