Review changes.
NR-873: Task plugin
* adjusted on review
NR-827 : Single Desk kanban view

Allmost done
Add configure menu and desks submenu.
Add todo comment for config menu binding to service.

Menu items must be binded to service. This should not be
the case because there are some items without any service
related to it.
LB-377: Redesign the sources tabs

fixed.
Fix backbone history starting.
Initial desk config screen - lists desks.
LB-443: Can't publish post after receiving error

fixed.
Add initial AddDeskView.
NR-943 : Switch article edit page navigation on Backbone.Router

fixed
LB-356 : Add Facebook as a social source

Quick fix
Add members list to config desks view.
Switch from edit members to add member func.
Implement menu for config view so submenus only add items to it.
LB-459 : Internal error happens when try to remove obsolete files from Media Archive
Move views/models into separate files.
LB-195: Reordering in AdminUI and Embed URL is messed up

fixed for embed.
NR-928 : Long file name goes over the div borders
LB-426 : Facebook source - Design