Session restoration fails when neovim is appimage

[me-nkr]

when neovim being used is appimage, the executed command path is pointing to a path in /tmp directory ( you can observe this by reading the contents of the resurrect file found in ~/.local/share/nvim/resurrect ) and will be obviously lost on system restart

I would suggest that we add some way of dealing with this, the following is my suggestion
in _just_command add something like xargs basename sed 's/.*\/\(\w*\)/\1/' which will extract the last part of the path, or something modified to handle the other cases