improve tooltips by only positioning the element once we know it's in… (#1693)

Things like tooltips now only sets its position once. The position used to be set twice and could cause some annoying flickering.

src/widgets/BaseWindow.hpp

@@ -90,7 +90,7 @@ protected:
 
 private:
     void init();
-    void moveIntoDesktopRect(QWidget *parent);
+    void moveIntoDesktopRect(QWidget *parent, QPoint point);
     void calcButtonsSizes();
     void drawCustomWindowFrame(QPainter &painter);
     void onFocusLost();