- Makes activity dropdown and resolved counter smaller
- Uses grid for spacing
- Removes scrolling on MR tabs

Remove unwanted change
Add changelog
Add check circle filled count widget
Change color for consistency
Remove resolve button class
Merge master
Change to single icon, conditional name
Remove authorship
Remove unnecessary added styles

Improve the renderign of new and existing discussions
by reducing the number of watchers on each object & array.
Previously every discussion change would trigger an update for every
discussion component.

Also tidied up some components to get them closer to our docs.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/51506

This reverts commit e0fe97ca4a506405af8e85368f2c69cda637e192.

This reverts commit ced005f3, reversing
changes made to 9b01b293.