bug#9503: 24.0.50; (vc-git): After applying a stash, refresh of *vc-dir* is a must

[Stefan Monnier]

> I would prefer to have some sort of visual feedback that confirms that
> the application of stash has succeeded. Otherwise I just keep staring at
> the screen hoping something would happen.

Agreed.  We should do our best to keep the *vc-dir* display up-to-date,
and in the case in point we know the display to be out of date, so
we're not doing our best.


        Stefan