The refs hash is used to determine what branches and tags have a commit
as head in the network graph. The previous implementation depended on
Rugged#references. The problem with this implementation was that it
depended on rugged, but also that it iterated over all references and
thus loading more data than needed if for example the project uses CI/CD
environments, Pipelines, or Merge Requests.

Given only refs are checked the network cares about the GraphHelper#refs
method has no need to reject those, simplifying the method.

Closes gitlab-org/gitaly#880

[ci skip]

`breadcrumb_title` is then overriden when needed

changed color of divider

Changed 'Commit hash' to 'Git revision'

This makes larger libraries more cacheable and will allow us to use SRI with the dynamically included libraries.

Resolves #18894.

This reverts commit 13e37a3e.

Replace raphael-rails with raphael.js so it can be split from the rest of the JavaScript. The gem isn't maintained anymore anyway. Added a network folder with an application.js including raphael components, since that's the only page using it currently.

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

With new navigation design it makes no sense to duplicate title in the
header

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

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

Closes https://github.com/gitlabhq/gitlabhq/issues/9657