1) Added aria-label to account-dropdown avatar
2) Added aria-label to change-star
3) Added computed aria-label to issue number
4) No action required
5) Added aria-label to remove reviewer button
6) No action required
7) Added aria-label to checkboxes
8) Added computed aria-label to file status marker
9) Added aria-label to file line +- markers
10) Solved by agable@
11) No longer an issue with unrelated changes to comments
Feature: Issue 4279
Change-Id: If735f369bae5d1e867c664a4d55d11664bbc5196
76067cdd13