Refactoring app delegate references
Refactoring app delegate references
Added NSFileManagerDelegate
Minor refactoring
Refactored table view references
Refactored [NSApp delegate] references
Added a helper method to access main managedObjectContext
Added a helper method to access main managedObjectContext
More NSApp delegate refactoring to fix building in new Xcode
Merge branch 'develop' of github.com:hjuutilainen/munkiadmin into develop

* 'develop' of github.com:hjuutilainen/munkiadmin:
  Minor UI updates for extracted icon image browser view
  Fixed small layout issue in icon chooser
  Packages right side view is now completely white
  Enabled cache cleaning after package extraction