Increase MR counter on navbar when user is designated as "reviewer"
Problem to solve
When a merge request author assigns a user as "reviewer" of the merge request, the designated user has no way of finding out without first have to check emails or todo's.
Proposal
When user is designated as "reviewer", increase the MR counter on the top navbar
![image](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)