added tabindex attrubiute
added tabindex attrubiute
added tabindex as a supported top level attribute
added tabindex to form elements on Special:UserLogin page
changed messages to pass tabindex attribute to Sign up link
added tabindexes in all three login forms
changed tabindexes in edit page to make it working correctly when login modal apears there
Merge branch 'bugid-97314' into consumer-sprint28-bugid-96170