Stash window may operate on unwanted stash under some circumstances when view is not refreshed

What steps will reproduce the problem?

1. Make some stashes, open Stash list window
2. Make one more stash
3. Switch to Stash list window -> stash list is still the same, it wasn't updated
4. Try to perform any operation on any stash in the list, e.g. delete -> surprisingly operation will be performed on another stash, not on one that is under cursor

It is sort of dangerous because one can accidentally apply or even remove unwanted stash.

I think that Stash list window should check if the stash list being displayed is up to date before doing any operation on it.