debugger: make 'address column' in stack and breakpoint view optional

src/plugins/debugger/breakwindow.h

@@ -56,6 +56,7 @@ signals:
 private slots:
     void rowActivated(const QModelIndex &index);
     void setAlternatingRowColorsHelper(bool on) { setAlternatingRowColors(on); }
+    void showAddressColumn(bool on);
 
 protected:
     void resizeEvent(QResizeEvent *ev);