Label modifications are not reflected in existing notes and in the issue list

When a label is modified (by changing its name/color) existing notes and issues still show the old version of the label. This is probably a caching issue. The cache used for notes and the issue list would have to be cleared/updated in this case.

Steps to reproduce

1. Create a new issue
2. Add a label (do this separately to create a note)
3. Go to the labels page and modify the name or color of the label
4. Go to the the issue list (the label has not changed)
5. Go back to the issue (the label in comment section has not changed)

Title changed from Label modifications are not reflected in existing comments/issues to Label modifications are not reflected in existing notes/issues

Title changed from Label modifications are not reflected in existing notes/issues to Label modifications are not reflected in existing notes and in the issue list

mentioned in issue #1990 (closed)

@DouweM Please take a look.

Reassigned to @DouweM

Assignee removed

Reassigned to @vsizov

Milestone changed to 7.13

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1028 it reverts issue caching.

Status changed to closed