Merge branch 'remove-wip' into 'master'

Easily (un)mark merge request as WIP using link

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/3768 and https://gitlab.com/gitlab-org/gitlab-ce/issues/3516

## Link to add `WIP` prefix (underline is visible because of hover)
![wipless_title](/uploads/72a6f7119ba9d8043ca8329641e97c3b/wipless_title.png)

## Link to remove `WIP` prefix
![wip_title](/uploads/8620ad65da9ef620b180603520fead55/wip_title.png)

## System note after WIP is added
![wip_sysnote](/uploads/2de073b75e854d2c9e243eb8b5d5c259/wip_sysnote.png)

## Widget with link to remove WIP
![wip_widget](/uploads/cf83ea93743c4c26d9df759c17cb9d7b/wip_widget.png)

## Flash after WIP is removed
![wip_flash](/uploads/27b7240cd5d7ceeb8b7b477abd94d7ff/wip_flash.png)

## System note after WIP is removed
![wipless_sysnote](/uploads/c0d3368abdf21a2f253532a9a9594d90/wipless_sysnote.png)

## Widget when current user cannot remove the WIP prefix
![wip_widget_unauthorized](/uploads/174ccf1674be86dc81c3078fe297acb7/wip_widget_unauthorized.png)

cc @creamzy 

See merge request !3006

1 files changed, 2 insertions, 0 deletions

diff --git a/CHANGELOG b/CHANGELOG
index 000c8b8b8eb..3b3ea97c012 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -8,6 +8,8 @@ v 8.6.0 (unreleased)
   - New branch button appears on issues where applicable
   - Contributions to forked projects are included in calendar
   - Improve the formatting for the user page bio (Connor Shea)
+  - Easily (un)mark merge request as WIP using link
+  - Use specialized system notes when MR is (un)marked as WIP
   - Removed the default password from the initial admin account created during
     setup. A password can be provided during setup (see installation docs), or
     GitLab will ask the user to create a new one upon first visit.