Improve Exception message for missing workspace files
added release notes entry and a test
Merge branch 'JENKINS-23006'
Fix behavior when creating Jabber targets that are not group chats
Removed useless condition
added release notes
Merge branch 'JENKINS-23090'

Conflicts:
	docs/Home.md
create/update folders, create/update views within folders
fixed build actions
fighting duplicated code
use the real Folder for testing, spying is not necessary