This change contains the following changes:
- allow submitting reviews without comment for approve
- fix openapi for /reviews api and fix UI calls for submitting reviews
- fix recently broken openapi for webhook (it removed has_secret field as part of openapi refactor)
- fix fatal submit review bug (we passed repo.UID not repo.GitUID to gitrpc - not sure how that ever worked?)
- add missing merge pr activity to list of all pr activity enum values
- return all PR states by default
- show Open PRs by default (instead of all) and fix state filtering query
- regenerate code services based on latest swagger
- fix UI code to work with regenerated code service
