Toasts refactoring
Minor improvements on account creation
Minor improvements on conversation display
Fix loading of messages into fixtures
Bugfix on confirm delete setting
save lastsync after full sync of a box
add mailboxes sync
bugfix attachments handling
code clean
tests new functions
Merge remote-tracking branch 'brice/master'
Fix display of inlines images
Move message by drag and dropping it
Some server tasks were never acknoledged
Add a displayPreview Setting
More keyboard navigation
Add a compact list style
Allow action button in frontend notifications
Add UI for undeleting messages
Fix strange regression in account creation