This'd be immensely useful for the color options added in #118. Additionally, the "transparent mode" option could simply enable the alpha channel in the "background color" settings instead of simply making the bar always completely transparent, which would allow even more customization.
[x] add alpha channel to color picker
[x] enable alpha for icons/text
[x] enable alpha for background color (transparent mode)
This'd be immensely useful for the color options added in #118. Additionally, the "transparent mode" option could simply enable the alpha channel in the "background color" settings instead of simply making the bar always completely transparent, which would allow even more customization.