Time to modernize; add multi-extract for Xarchiver only.

Submitted by e.l..@..ok.com

Assigned to Jannis Pohlmann

Link to original bug (#16518)

Description

Perhaps the single extract limitation is because of support for various archivers however it is well known that xarchiver is XFCE's default archiver and thus it alone should be given exclusive multi file extraction support. Xarchiver supports extracting multiple files at once. Please implement this feature.