Audio svg change background color when using dark mode

[advait404]

In the side berry setting file, the background for audio svg should be something other than #fff when in dark mode, since otherwise the 'music' icon color and background color become the same.

eg, it can be changed to black:

.audio svg {
background: #111111ff;
}

[macleod-ee]

I'll add this into the next release, thanks for reporting this!

[macleod-ee]

Added.