Increased dropdown menu width
Fixed sign out icon name
Fixed always capitalizing subtitle

Added raw_subtitle content key
Fixed sidebar's components styling in invitation acceptance form
Refactored sidebar styling
Added missing specific css class
Refactored pages' placeholders into i18n
Fixed icon naming
Fixed form actions layout
Refactored alert styling
Fixed loader spinning behavior
Fixed bad use of notice flash type instead of alert
Refactored sidebar social integration content