GH-866: wire up the status block to the data

Feature/957 tweaks

cater for more than two lines in the status block

adds mock status block

Feature/877 note polling

#957 change to the way assigned reviewers save for role reviewers add/remove when they have reviews and a test

Feature/937 & 938 Waiting for Review and Previous Reviews on Dashboard

#957 don't save role reviewers who have already reviewed as additional records in assigned reviewers