Pulseaudio - Sound toggle icon is not visible when highlighted

[kepler2]

Hi and Merry Christmas!

Congratulations for your work, appreciated. Sorry to bother you.

I noticed that in the Pulseaudio (plugin) pop-up, the sound toggle icon is not visible when the option is highlighted.

Please see the screenshots below.

Not highlighted:

Highlighted:

• OS/version: Arch (Linux 4.19.12-zen1-1-zen x86_64)
• GTK+ and/or application versions: xfce4-pulseaudio-plugin 0.4.1-1

Thanks for your work.