- expand upwards
- expand downwards
- expand all

in both inline and parallel views

Using the sed script from
https://gitlab.com/gitlab-org/gitlab-ce/issues/59758

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/51737

Dropdown includes buttons for tree view rendering mode
and buttons for the compare view (inline or side-by-side)

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/55491

This file tree displays all the diff files in a tree like format
Each file is taken and converted into a tree with folders
Each folder can be toggled open & closed
Clicking a file will scroll to the diff file & highlight with a glow affect

Searching the tree list will search only files & return a list of the
files without any folders

Each file row contains an icon to show changed, new file or deleted
Each row will also contain the added & removed lines count

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/14249

Signed-off-by: NRémy Coutable <remy@rymai.me>