Use `search_text_nodes` helper in our custom filters

Closes #1477

See merge request !561

New sidebar design

I want to make separation between sidebar and content

- [x] change sidebar and header colors
- [x] change colors for old light theme so it matches dark style too
- [x] rename theme names to something more reasonable
- [x] fix header logo collapse with JS
- [x] fix navless layouts (explore page, login page, snippets, user page)
- [x] fix tests

See merge request !558

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

Conflicts:
	app/controllers/snippets_controller.rb

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

Fix Node.js Error in Documentation

"Reply quoting selected text" shortcut/hotkey

Adds the <kbd>r</kbd> hotkey for quoting selected text on Issuable forms.

This MR also updates the jasmine gem and adds jasmine-rails to let us use the asset pipeline (and Coffeescript) in JS specs.

See merge request !1775

Add Fieldset Support to Project Services Views

Update command in upgrader docs to work with 7.10.0.

See merge request !562

Closes #1477

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

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

split field logic to separate template.

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

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

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

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

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

Updated Slack documentation

Fixes #2234

Updated the Slack documentation to include the new fields located in the service's settings.

/cc @karen

See merge request !1788

Recover from URI::Error

`URI::Error` is the base class for all URI errors.

Fixes #2257 and #2260

See merge request !1789

add 7.9-7.10 upgrade doc

See merge request !560

Fix user API tests succeeding for the wrong reason

Update gitlab-grack to 2.0.2.

Updating to grack version 2.0.2 to fix an issue with smart http clients.

See merge request !559

Remove html-pipeline-gitlab

Ports the custom emoji filter to the app itself.

See merge request !1781

Fix tab behavior on MergeRequests#new

Missed this one in 269aee79

Prior to this fix, clicking the Commits or Changes tab when creating a new MR would reload the page instead of display the tab contents.

See merge request !556

Make issue preview look like the result

do not send empty message to hipchat

The requests were missing multiple required attributes, while testing for single attribute missing.
Added test for checking username as required attribute.

Fixes #2257
Fixes #2260