Bug#367233: gksu caps lock changing doesn't clean background

[Bruno T. Santos]

Package: gksu
Version: 1.3.7

When the caps lock is on, or used on password input, turning it off
leaves half the "old" gksu window (when the message regarding caps lock
shows up) showing (the buttons on the bottom).

Also, I noticed that if you use multiple desktops and change desktop "in
the middle" of gksu starting up, the faded screen shows half the window
that was on the old desktop.

I'm on Ubuntu Dapper Drake.