Please describe the problem:
This ugly little problem takes place when you are searching something from a
list using typeahead search. I usually just want to click some OK button (for
example in filechooser) immediately after the right item is highlighted. The
problem is that the button do not react to clicking, no matter how many times
you try to click it. You have to first leave the button and enter it again and
after that it works! (I know that it would be much easier to just press enter in
filechooser anyway ;)

Steps to reproduce:
You can use any GtkFileChooser in open mode or even gtk-demo ("Editable Cells"
tester)

1. use typeahead search in treeview, a popup will appear.
2. move mouse above some button
3. Try clicking the button. 


Actual results:
The first click hides the popup, but the second one should cause the button to
be pressed, but no. Nothing happens! You have to move mouse outside the button,
enter the button again and press. There is no difference whether you close the
popup by pressing mouse or wait until it closes by itself.

Expected results:
The click should cause the button to do it's job ;)

Does this happen every time?
Yes

Other information: