[x] Volume control slider cannot be interacted with because it doesn't stay visible when leaving the hover area of the volume icon. I know this is possible with pure CSS, evident from the many examples of multi-layer drop-down menus. I just can't get it to work here. Any help appreciated
[x] Once volume control slider stays visible the styling needs to be fixed
[x] Once volume control slider stays visible the functionality needs to be verified
[x] Ideally the progress track and thumb is made more Discord-like, but I can only push web standards so much and Discord doesn't actually theme through -webkit-slider-runnable-track (or use an input element at all for that matter)
[x] See if some code can be extracted so it can be re-used for #410
TODO:
-webkit-slider-runnable-track(or use an input element at all for that matter)fixes #409