Bump to 2.9.0~pre8
Don't try to use fallback pool folder if it doesn't exist
Re-register extension ui files when on event_open_experiment
Accept QIcon in theme.qicon
Support actions in quick switcher
Use debug.msg instead of print in example extension
- To avoid unicode exceptions when printing to terminal on Windows
Bump to 2.9.0~pre9
Clear filter input on activate in quick_switcher extension
Bump to 2.9.0~pre10
Fix automatic_backup extension so that it uses experiment.save() directly
- Avoids having to restore current path etc. in main window
Update help extension
- Add docstrings
- Don't add online-help menu on load failure
Revert "Bump to 2.9.0~pre10"

This reverts commit b984e7fd317617e3a0c5da29938b17a96b3b189a.
Revert "Update help extension"

This reverts commit 935c099eceb232eaa797d0b84fee0f3871a8898b.