Most starred projects page for Explore area

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@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