simple questions

[Brad Borch]

1) Is there a function that executes when exiting edit mode and entering 
  browse mode (e.g., to automatically initialize variables)?

2) Is there a handler generated when focus is returned to a stack (say, 
after a modal or other type of substack is closed)?

3) Where do I "keep" images or other objects that will be used in 
buttons? Should I include them in the stack on a card that is not 
accessed, or just have them anywhere but invisible?