Counter Updates - fixes #2152

STT:
* add a counter brick
* it has a "Starting Count" editable (used to be called 'Starting Value')
* set it to 5
* add a button and link it to "Reset to Starting Count" , which used to be called "Reset Count"
* tap the counter a few times so that it increases beyond 5
* tap the button
* counter is set to 5
* Also, "Count Up" listener no longer has an exclamation after it "!" like it used to.

Question - does this break every app that relied on "Reset Count" setting the value to 0 instead of the starting value, does'n it? Do we care? What should we do?