Small bugfix rollup

A handful of small-to-medium bugfixes for bugs found while working on
new stuff:

* Text updates to KeySelectButtons' hints / tooltips in several places.
* PopupEditor:  LockedOptions, when written out, were missing "" which
  caused CoH to complain when loading them, even though they seemed to
  work just fine.  Now CoH is happy.  Popmenus will need to be reloaded
  / rewritten in order to make CoH stop complaining.
* PowerSelectors on the General page would crash on a few powersets that
  have nested Powers, such as Corruptor -> Dual Pistols -> Swap Ammo
* Lots of test suite fiddling, including the start of actual tests for
  the Profile object, where possible without instantiating the GUI.

Author: emersonrp