feat(authoring): Added theme selection to authoring.

SD-1130
fix(auth): Improve code for theme changing
[SD-1157] Fixing the "Go to items" link on the ingest providers page.
Merge pull request #585 from nidzix/devel

feat(authoring): Added theme selection to authoring
fix(users): Delete user generates a js error
Merge remote-tracking branch 'upstream/devel' into devel
Fix for the source facets
Merge remote-tracking branch 'tolga/devel' into devel
SD-885 creation of a new user role with repeating role name
fixed role name validation and user email validation