How to set seekbar handle color separately?

[madjxatw]

I saw in the demo screenshots that the seekbar progress and its handle can have different colors, but there seems no way to control them separately. seekbarfg_color sets both of them.

[Samillion]

Fixed in #656 thanks to @Keith94

Use option seek_handle_color to set a hex color

# default
seek_handle_color=#FB8C00