Fix: API 500 error when project does not exists
Fix overflow of text in the project summary box in Chrome and Safari
Update model methods
Perfomance updating Project activity sort
Fix tests
Install gems with user `git`, not `gitlab`.
remove draper
refactor scss, refove unused classes
Redesign issues, mr lists
apply redesigned MR list to dashboard, group etc
Increase event title font size on dashboard activity feed
New entries in CHANGELOG
Fixed JSON description of system hook

Fixed JSON description of system hook to accurately describe what is actually being sent.
Refactoring & restyle pagination:
- remove admin kaminari theme. Use gitlab theme everywhere
- use bootstrap styled for gitlab admin themes
- dont reload page when change issue filter
Fixed mr filter tests
refactor Issues.js. Remove unused actions. Respect filters while searching for issue
remove outdated routing specs
Merge pull request #3538 from AeroNotix/patch-1

Fixed JSON description of system hook
Merge pull request #3522 from dplarson/correct-install-docs

Install gems with user `git`, not `gitlab`
Fix overlapping test case names.