Editor: update autocompleter list width.

The width of the List view showing the
autocompleter proposals is now adjusted
when scrolling.

Task-number: QTCREATORBUG-7185

Change-Id: I5b26ef6195d389b30fdf0964bebd9c2f33056c66
Reviewed-by: Leandro Melo <leandro.melo@nokia.com>

src/plugins/texteditor/codeassist/genericproposalwidget.h

@@ -60,10 +60,12 @@ public:
 
 private:
     bool updateAndCheck(const QString &prefix);
-    void updatePositionAndSize();
     void notifyActivation(int index);
     void abort();
 
+private slots:
+    void updatePositionAndSize();
+
 protected:
     virtual bool eventFilter(QObject *o, QEvent *e);