Destination folder for --appimage-extract

Please add a parametr that would allow to specify a destination folder for the --appimage-extract parameter.

This additional parameter would prevent eventual conflicts in case if in the folder is already a squashfs-root folder (for example forom another opened project (like for example automatically extracted ISO file while the reworking process)

Thanks for your suggestion @mcgiwer, please open a feature request over at Sign in to GitHub ยท GitHub.