Panic button#44

Add a big red panic button / stop current print at the top of the screen so you can do an emergency stop from any screen.

I noticed a problem recently when I had an auto print that was occurring that I didn’t want to go through. I could not cancel or force stop the print in session until the actual printer jingle rang out and ‘started” the print. Then I could stop it. We really need something that’ll hard stop the process even before it’s sent to the printer. A Panic button, or a simple stop button seems like it could fix this.