Description of problem:
In the Add to Panel dialog, one can type letters to do an
incremental search through the available items to be added
to a panel.  Typing 'm' for example will scroll the list
down to the first item whose name starts with that letter.

When typing a character for the first time in that dialog,
a text field appears and is positioned partly over the
Back and Add buttons.  It was probably meant to appear
between the Help and Cancel buttons instead.

Version-Release number of selected component (if applicable):
2.8.1-3

How reproducible:
Always.

Steps to Reproduce:
1. Use context menu on panel to get the Add to Panel dialog.
2. Type 'm'.

Actual results:
The list scrolls down and a text field appears at the
bottom right of the dialog, over the Back and Add buttons.

Expected results:
Text field positioned between Help and Cancel buttons,
or no text field at all.