I just updated to Source Tree 2.5 on my Macbook Pro. Before the update I could create a split screen view (like described here) of the window with the overview of all my repos and the repo window.
Like so:

But ever since the update, I can't go fullscreen with the repo overview window. The resize button in the top left is a "+" sign instead of the two triangles/arrows.

Is this intentional in the new release? Bug? Or can I achieve the full view otherwise? I've searched the settings, but nothing...