Improves Preferences dialog's "accept" speed. Before it would try changing the
style no matter what which took a noticeable amount of time to do for no real
purpose if the style didn't change.
This required various changes to various parts of the infrastructure (mostly
using paths to finding the "root project" of any given object throughout).
Now theoretically infinite projects can be opened and accounted for at any
given time.
itsmattkc