bug#16403: 24.3.50; Rectangular selection visually disturbing

[Bastien]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> I'll will wait for other maintainers to give feedback and apply
>> this on monday if it's good.
>
> It's probably fine for ttys, indeed, but it doesn't solve the problem
> for GUI frames.

I thought the behavior in GUI frames was acceptable,
and the "glitch" a way to warn the user.

Maybe in GUI the visual hint could be a change in the cursor
shape?  E.g. from box to vbar.

-- 
 Bastien