Description of problem:
When a warning/error dialogue appears it can get hidden behind the Find dialogue.

Version-Release number of selected component (if applicable):
gconf-editor-2.12.0-2

Steps to Reproduce:
1. Open gconf-editor
2. Use 'Find' and search for something you know won't be found
3. "Accidentally" click the Find dialogue when the Error 'Pattern not found'
appears. Assume that for some reason you didn't see the Error appear (like you
just clicked at the wrong time, or you just dismissed it as something that had
nothing to do with gconf-editor).
4. Note that the Error dialogue gets put behind the Find dialogue, and you have
to move it out the way in order to work out why it's not responding.

Actual results:
Error dialogue gets hidden behind Find dialogue.

Expected results:
Error dialogue shouldn't be allowed to move under the other dialogues. The
current FC4 version (2.10.0-5) of gconf-editor behaves correctly.