We send a state of ansi2html to client, client needs to send this state back.
The state describes the configuration of generator and position within trace.

I wanted to share what I learned trying to debug web hooks using
netcat.

Codestyle changes to easy EE merge

Closes #15533

Closes #15527.
Signed-off-by: NRémy Coutable <remy@rymai.me>

- Parameter validation as ISO8601 format

This button depends on Issue#can_be_worked_on? which in turn depends on
Issue#related_branches. By rendering this button asynchronously we can
finally remove all usages of Issue#related_branches and
Issue#referenced_merge_requests from the issues "show" page.

Closes #13992

Closes #15515

Add due_date text field to sidebar issue#show
Add ability sorting issues by due date ASC and DESC
Add ability to filtering issues by No Due Date, Any Due Date, Due to tomorrow, Due in this week options
Add handling issue due_date field for MergeRequest
Update CHANGELOG
Fix ambigous match for issues#show sidebar
Fix SCREAMING_SNAKE_CASE offenses for due date contants
Add specs for due date sorting and filtering on issues

Created issuable singleton to house the filtering

get the multi filter labels feature to work on merge request, also escape characters in the templates to prevent xss attack

update changelog

This invalidates one test, which we've removed.

Closes #15330

Signed-off-by: NRémy Coutable <remy@rymai.me>

Issue: https://gitlab.com/gitlab-org/gitlab-ce/issues/12785
Merge Request: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/3514

Currently this works by loading the HAML partials via XHR. While this is
not the nicest setup it _is_ the easiest setup using the tools we
currently have.

Loading this data asynchronously doesn't make loading the related
MRs/branches itself faster, it merely ensures that loading the issue
itself is not slowed down.

Fixes gitlab-org/gitlab-ce#14949