ux: better tooltip for inline comment toggle

frontend: ensure polyfills are loaded as early as possible

styling: setting size on mention gravatars

appenlight: add basic tags to every request

frontend: added favico.js to requirements

styling: fixing gravatar size for reviewers

nix: Updated hash of rhodecode-tools. This should be the last time we have to update the hash without code changes in rhodecode-tools becuase the archive creation now uses the modifucation time of the changeset. Therefore the hash only changes if another commit is referenced.

codemirror: move some code outside of helpers for reuse

reviewers: store reviewer reasons to database, fixes #4238

reviewers: add pull request reviewers reason column to table to allow showing the reason a user is a reviewer on a pull request