Configurable volume panel style (1/2)

- We can set:
1 - Single
2 - Expandable
3 - Expanded
4 - None

Original commit: d628aa068e0530070767b42f7c63c98c8f0fc446
Thanks to @StevenHarperUK

Change-Id: Ib69100346f5c9bc93204fc4b585798d0b5a18f93