Description of problem:

When the focus mode for gnome is set to mouse or sloppy, a window looses focus
when the mouse goes out of the window surface. This also happens when the 
mouse is on a pull-down menu that is partially outside of the window. The
entries not inside the window are not selectable.

This is very annoying for us since a critical web application with small
pop-up windows show this effect. The work-around is to control the selection
with the cursor keys.

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

RHEL7, up-to-date.

How reproducible:

Always, easily with firefox.

Steps to Reproduce:
1. Start the gnome desktop
2. Set focus mode to mouse using the tweak tool
3. Open firefox and go to facebook.com registration page
4. Resize the window such that the month pull-down menus will extend beyond the bottom of the window
5. Try to select December

Actual results:

Cannot select because the window looses focus.

Expected results:

Window should keep the focus when the mouse stays in the pull-down menu even
if it leaves the window.

Additional info: