[sugar] after an Activity stops

[Mikus Grinbergs]

In Joyride 2146, when I 'stop' an Activity (by clicking on the 
octagonal 'Stop' icon in the Activity screen's header), what gets 
shown next on my screen is the last "throbber" page from whatever 
Activity is now at the top of the Activity stack.  My XO just sits 
there at that nearly-blank blank page (with the icon of that 
uppermost Activity in the center of the page) until I press keys to 
show me something (for instance, I can press F4 to show me the 
Activity View).   I don't expect that an Activity which is already 
on the stack needs to be re-initialized -- even if it did, I would 
expect the system to "automatically" proceed to a "real" screen 
(instead of getting "stuck" on that uninformative "blank" screen).

mikus