[Feature] Add option to disable background on lyrics page

[derbuschman]

First, the text was translated with Deepl. Second, your Galaxy theme is really cool. I only have one request, could you add a button that turns off the background in the lyrics? These can be read (at least with me) only very badly before they are right from the timing to the music or if I hover over it with my mouse. If there is an extra section where improvements can be suggested, I'm sorry to write this here, I'm new to Github. Yours Jacob

[harbassan]

I'll add an option to do this in the settings when I do the next update. Shouldn't be too long.