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
Remove unused code
Merge pull request #5123 from svbergerem/remove-unused-code

Remove unused code
Started writing tests for delete photos
Added delete label to photos in gallery
added an event to delete photos of current user
Added css for hiding/revealing the delete label
Included the photo stylesheet
Added cucumber test for deleting your own photos