Bug 529135 - [Layers] Amend the UI

- Disable some unused fields
- Change the Layer tab priority
- Add a new hide layer elements handling through css styles

Change-Id: Ife944574cb10f0a046bad1f8fb8b8db9bf09d7c8
Signed-off-by: Quentin Le Menez <quentin.lemenez@cea.fr>
80 files changed