Menu works in stand alone but not in Game view in Editor

Unity 5.1 on Windows. I have a Canvas with a panel called mainMenu and a button called fightButton. The button has an On Click() for Editor and Runtime that loads a script called mainMenu with the parameter fightMenu.

This all works fine if I Build and Run a standalone app but in the Game tab in the Editor it's not working. The odd thing is this was working before and I have no idea what changed. Mouse control of the camera also doesn't seem to be working in the Editor but is in standalone.

Ideas?