Stop automatic actions in editing mode

[Jim Lyons]

Dan offered the tip:

> Before you open the stack, click on the "Messages" icon in the Rev
> toolbar. That suspends all system messages until you toggle it back
> on. Saves my life about three times a month.

Then later, when nothing is working anymore, not even mouse clicks, and 
you're tearing out hair, and yelling to the neighborhood, "THIS WAS 
WORKING A MINUTE AGO!!", just reach up and flip it back on again. This 
happens to me about twice a month.

Jim Lyons