- Don't create a SoundSystem just to send #shutDown to it, so that its lazy-initialization will not try to pop up a menu asking the user which type to create and, in the process, invoking WorldState behaviors from outside the UI process and colliding with the new intercycle pause implementation.
Finding Morphs from Tools: Unify two hacks and lose a third.
Certain tools _have to_ access the morphs representing them,
especially the one representing the code pane of them. Hacks
where in place, including duplicated code. This code is
now centralized. (pattern is: find a dependent (!) that is a
a (e.g.) PluggableTextMorph with a certain getTextSelector).
Even more, the debugger relied on the exact layout of the call
stack for its "run to here" feature. This now uses the same hack