Redesign login page
Merge pull request #5112 from svbergerem/login-redesign

Redesign login page

Conflicts:
	Changelog.md
Add fallback system to frontend I18n system

Load the default locale and fall back to it on missing key
and interpolation errors
Merge pull request #5120 from jhass/i18n_js_fallback

Add fallback system to frontend I18n system
Modified behavior of mark all as read button