Sync widget grid properties on resize.

SDUX-52
Test alternative structure for apps.

Move items app from superdesk/items to superdesk-items folder.
Move each plugins into its own top level folder.
Fix tests.
Fix bootstrap loading.
Fix styling for ingest settings

Fix styling issue that come up with changing of providers options.
SDUX-48
Merge remote-tracking branch 'nikola/master'
Merge branch 'src'

Conflicts:
	app/scripts/superdesk-dashboard/directives.js
	app/scripts/superdesk/dashboard/views/grid.html
Fix nav bar current menu label.
Implement ingest items provider filter.

SDUX-9
Merge remote-tracking branch 'ozan/griditem-fix'

Conflicts:
	app/scripts/superdesk-dashboard/directives.js
Created menu service.
Updated all plugins.
Updated navigation menu directives.
Cleanup after merge.