Qt "Get" -> "Pick up"

Both the toolbar button for pick up and the action menu entry for
pick up were labeled "Get".  That's confusing for an experienced
player who is looking for "Pick up".  Rename both of them.

Also, consolidate repetitive code used to set up toolbar buttons.

win/Qt/qt_main.h

@@ -77,6 +77,8 @@ private slots:
 
 private:
 	void ShowIfReady();
+        void AddToolButton(QToolBar *toolbar, QSignalMapper *sm,
+                           const char *name, int NDECL((*func)), QPixmap xpm);
 
 #ifdef KDE
 	KMenuBar* menubar;