added urgent tasks implementation
fixed pull problems
fixed merge problems
buttons for normal projectusers disabled
added projectOwner to projects.index
Default Value for assigned User in task Modal
Added default value for priority in Task Modal
Added default value for Dedline in TaskModal
added last_updated_at logic
Merge branch '1_Minor_Changes' into development
fixed minor problems
fixed small problems
Changed visual style of Priority to an hader div
Changed Inbox and Sent Mails to Conversations
Fixed toggle function for Lists
Reworked basic Drag and Drop System
fixed problems with urgent_tasks
Merge branch 'development' of https://github.com/KevinThielen/Komana into development
Added new styles to registration new and edit validation
solved turbo-link issue