Description of problem:
It is impossible to add new folders from the 'Message Filters' dialog.

Version-Release number of selected component (if applicable):
evolution-2.30.1-2.fc13.x86_64

How reproducible:
always

Steps to Reproduce:
1. Main Window: Edit -> Message Filters
2. 'Message Filters' dialog: Add
3. 'Add rule' dialog: Move to folder -> <click here to select a folder>
4  'Selct folder' dialog: New
  
Actual results:
'Create Folder' dialog appears, 'Folder name' field has focus, but you cannot type. In Fact, everything in the dialog is blocked, 'Cancel' doesn't work ether because the focus still is in the 'Select Folder' dialog below. You need to first click 'Cancel' in 'Select Folder', then you can close the 'Folder Name' dialog.

Expected results:
It should be possible to create net folders from the 'Add filters' dialog as it was before.

Additional info:
According to https://bugzilla.gnome.org/show_bug.cgi?id=593890 the problem already existed in 2.28.x, but I never noticed it.