same release notes, new (beta) release

Merge pull request desktop#5565 from desktop/the-first-one-four-oh-beta

the first 1.4.0 beta

bump for first beta of 1.4.0

bump for next version

tidy up protocol registration code

bump beta to 1.3.5-beta0

Bump for production

Stick this back in

bump beta to ensure it's ahead of production

Merge pull request desktop#5408 from desktop/changelog-for-next-update

draft release notes for next update