Add the following line to GDK Procfile to play with it:

    webpack: exec support/exec-cd gitlab npm run dev-server

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

Creates individual html for dropdown
Adds simplified  CSS for the new dropdown
Removes old CSS
Improves dropdown item in Chrome, Firefox and Safari
Use SCSS variables for colors.
Fix scss linter errors
Adds animation when the stage is hovered.
Adds back tooltip on dropdown toggle
Fixes broken tests
additional css changes to get more into direction of mockups

if we are in the Merge Requests page, this change will clone existing note-edit-form and add a mr-discussion-edit-form class to cloned element so we will have two note-edit-form in place. One for Discussions tab one for Changes tab.

For MR page, we basically need two note-edit-form because you may want to edit your comment in both tabs at the same time and we shouldn't remove or discard note-edit-form in other tab.

Also added relevant specs and refactored to_references in a bunch of places to be more consistent.