Volumio stylesheet modifications

[pattdepanick]

Add modifications into this git repo to avoid problems with volumio updates.

[pattdepanick]

please refer to the following thread
https://forum.volumio.org/change-color-appearance-t10650.html

[pattdepanick]

Make these modifications as part of the install process and provides a restore to default function when willing to update to a newer version of volumio.