release: Finish preparation for 4.5.1

release: updated pip2nix output for 4.5.1

release: Start preparation for 4.5.1

docs: added release notes for 4.5.1

pull-requests: when creating a new version set the created_date to now instead of coping it from original object.

inline-comments: added helper to properly count inline comments.

outdated comments: flip the logic of comment invalidation to show comments if invalidation is turned on.

repository-groups: improved detection of repository groups parent. - set to personal repo group for non-admins - default to root value for super-admins

exception-handling: nicer error catching on repository creation.

ux: fix bug where limited diff message wasn't spanning entire table