Add open/close and delete buttons to open/close and delete projects to d...

...ashboard and all projects view, add those methods to corresponding controllers and projects factory
@tobiasmuecksch Thanks for the tip. After implementing it with filtering I don't see why it's better. Since it's not only necessary to filter but to assign too it didn't improve the code that much and made it more complicated. I'd like to let it as it was if it's ok with you, too