Most starred projects page for Explore area

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Moved some behaviour to one place

Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>
Tests for trending/starred pages

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'most-starred' into 'master'

Most starred projects page

Fixes #1461

See merge request !996
Merge pull request #7319 from jvanbaarsen/small-eventcache-refactoring

Moved some behaviour to one place
Remove unused title parameter.

It is always overridden by to humanized source branch name by
MergeRequests::BuilService, which is used by new_project_merge_request_path.