overlay theme does not allow full screen editing of labels so you can't ever return to normal editing.

I noticed today on Moodle 2.5 that my overlay theme does not allow full screen editing of labels so you can't ever return to normal editing. The button is hidden. It works fine in other themes. I'm uploading an example so you can see.

Any ideas how to fix that theme so the minimize/maximize button is visible? I see that the working themes do NOT show 'you are logged in as' whereas the Overlay theme DOES show 'you are logged in as' but this replaces the top of the label which does NOT show.

Occurs in firefox and chrome so label hiding behavior does not appear to be browser related plus works fine in both with a different theme.

For screenshot and forum post go here
https://moodle.org/mod/forum/discuss.php?d=233468