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
Merge remote-tracking branch 'brice/master' into refacto/no-promise

Conflicts:
	server/controllers/messages.coffee
	server/models/settings.coffee