[enh] add possibility to delete current wallpaper

Submitted by pro..@..gmx.de

Assigned to Eric Koegel

Link to original bug (#12179)

Description

hy,

i use the xfdesktop to change every 2 minutes my wallpaper. this is my way of reviewing holiday pictures. Can you please add the possibility to delete current wallpaper?

Would be great, thanks

Micha

Version: 4.12.2