Play under clock

[BHydden]

While zoomed in, I clicked on the clock, with the desired effect of zooming out to re-evaluate the board. Instead, the game played a move at the random point that happened to be behind (underneath) the clock that I couldn't see. Fortunately, my opponent allowed me to undo the move, but I don't think the app should let you play at a coordinate that you can't see on the screen.

Tech details:
v. 0.8
device: Samsung Galaxy S7