fix(windows): Keyman was crashing sporadically

Fixes #2147.

This potentially addresses the issues reported in #2147 where Keyman
would crash due to a race condition as a critical section was not
deleted before attempting to recreate it.

Some logging has been added for debugging these issues.

Also fixes memory leaks and another race on startup relating to loading
the taskbar icon.

There are still some known memory leaks because DLL_THREAD_DETACH is
not called for all threads before keyman32.dll is unloaded, so those
threads don't get the opportunity to clean themsselves up. However, the
key danger with the csGlobals critical section has been addressed.