Add ability to search in issue description and issue comments

 * edit queries in serach context
 * edit template for result
merge into current master
Update ability to search in issue descriptions and comments
Fixes a problem with 'Issues' filter box, where description of the filter says 'Filter by title or description' but in fact filter only works for title and doesn't work for description
Add autofocus and tabindex.
links to issues on main dashboard
Update event helper to display target_iid in event title instead of target_id.

The event helper is used extensively within the dashboard atom feed, so by
fixing this, we fixed #303.
Project commit count respects default branch. Closes #299
Document that we don't want pushed commits to be rebased and give a rationale for many small MR's policy.
We need to change config in step 5
Fix for copy paste formatted text
Fix typo
Merge pull request #7043 from jvanbaarsen/update-installation-dox

We need to change config in step 5
Add gitlab shell version file.
Add python-docutils to dependency list.
Merge branch 'update_installation_doc_python_docutils' into 'master'

Update installation doc with python-docutils

Fixes #1293
Update check task and add to monthly release doc lines about gitlab_shell_version file.
Make a system comment when issue milestone changed

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Fix tests

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Make a comment to MR whne milestone was changed

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