Fix position of project mirror status

Fixes https://gitlab.com/gitlab-org/gitlab-ee/issues/123

See merge request !82

ce-to-ee

See merge request !81

Fix inline panel heading height

The `line-height` was added so that headings in the panels on the settings page had the same height as headings elsewhere, but the style applied everywhere :)

Before:

(Look at the "Unstarted Issues" heading)

![Screen_Shot_2015-12-15_at_17.39.46](/uploads/9dbea4c8b28e3c43bb5d4b5226d7a1ec/Screen_Shot_2015-12-15_at_17.39.46.png)

![Screen_Shot_2015-12-15_at_17.40.19](/uploads/97898418e9a66954c02e8a68b21c08b9/Screen_Shot_2015-12-15_at_17.40.19.png)

After:

![Screen_Shot_2015-12-15_at_17.40.45](/uploads/5748aba032889053dd778b39e96fa301/Screen_Shot_2015-12-15_at_17.40.45.png)

![Screen_Shot_2015-12-15_at_17.40.40](/uploads/20240cdc7a6d5665cd32556d1a0e6c1d/Screen_Shot_2015-12-15_at_17.40.40.png)

cc @skyruler 

cc @rspeicher 8.3 please!

See merge request !2106

Add feature specs for note polling

Ref. #4032, !2084

cc @rspeicher 

See merge request !2086

This also increases capybara timeout to 15 seconds (note polling
interval). Capybara will look for new note for this period of time.

Ref. #4032, !2084

Fix note polling

Closes #4032

See merge request !2084

Preserve trailing new lines at the end of file on the online editor

Fixes #3784

Because Haml automatically indents the HTML source code, the contents
of whitespace-sensitive tags like pre and textarea can get screwed up.

See merge request !2099

Clean up CONTRIBUTING.md

* Use 80 chars width where possible
* Remove easyfix label reference
* Add new issue submission template
* Add long links to the bottom of the page

See merge request !2100

[ci skip]

Add upgrade guide for 8.2 to 8.3

Making sure we don't forget mentioning the need to upgrade Redis from
!1888. Added this in preparation for 8.3.

[ci skip]

See merge request !2085

[ci skip]

* Use 80 chars width where possible
* Remove easyfix label reference
* Add new issue submission template
* Add long links to the bottom of the page

[ci skip]

CE upstream for 8.3 RC1

See merge request !77

Because Haml automatically indents the HTML source code, the contents
of whitespace-sensitive tags like pre and textarea can get screwed up.

update guides for feature proposals on the issue tracker

see also #4038 

cc @sytses 

See merge request !2094

Fix Typo [mailinglist to mailing list]

Closes: #4078 

See merge request !2098

[ci skip]

Add upgrade guide for 8.2 to 8.3

Making sure we don't forget mentioning the need to upgrade Redis from
!1888. Added this in preparation for 8.3.

[ci skip]

See merge request !2085

[ci skip]

[ci skip]

[ci skip]

[ci skip]

Suppress warning about missing `.gitlab-ci.yml` if builds are disabled

When user disables GitLab Ci Service in project's settings then warning
about missing `.gitlab-ci.yml` file should be supressed. This a matter
of user experience as stated in #3761 (closes #3761).

cc @ayufan 

See merge request !2014

[ci skip]