WIP on using forms for authentication
WIP on new external authentication
Fix border-top issue on ipad in the signin dropdown
Abstract strategy detection to authentication API
Made Sign In button on Access Denied page behave consistently
Self review on authentication redirect
Followed up on external authentication redirects review
Merge pull request #3717 from nicolaasmatthijs/authentication-redirect

External authentication redirect
Merge branch 'issue-3683' of https://github.com/bp323/3akai-ux into issue-3683
Synchronized Chinese translation