Switching between tabs moves Combine button over text size buttons

[Guntis]

Switching to another tab and back moves Combine button over the Decrease / Increase Font Size buttons. See the attached screenshots—notice that Combine button in the far right pane is moved over the Decrease / Increase Font Size buttons. I can load combined resource again, that moves this button in its correct position, but switching tabs moves it back again. 

Edited October 5, 2016 by Guntis