Fix find_scheme() always returning False and fix Unicode error

I think I introduced a bug last night in PR #20.  My change to `find_scheme()` tries to compare scheme names with scheme paths, and it always returns `False` because it can never find any matches.  This causes **Add current scheme to favorites** to silently fail.

Also included in this PR is a minor tweak to the "★" literal that fixes an error on Windows ST2.