Revert "Revert to pre-release status due to some trouble with PsychoPy > 1.80.02"

This reverts commit ca28fc20b051606fda6101fe580dcfdb0a7865b8.
Use unicode comparisons in conditional statements
- Fixes a problem where non-ascii string comparisons in conditional statements where always false
Bump to 2.8.2~pre6
Don't auto-apply edit script in qtitem.get_ready(), because it happens automatically when losing focus