Give option to install snap package in classic confinement
There are a number of snap packages which (apparently) don't explicitly require classic confinement mode, but are restricted in there functionality without it. For example:
- VLC media player doesn't allow me to open media files from my Music directory.
- Discord doesn't allow me to send files from many directories.
- etc.
For this reason, an option in gnome-software would be great to install a package in classic confinement mode even if not ultimately necessary for running it (ideally accompanied by a warning to the user).
Currently I'm just reinstalling certain packages from the command line, but that's obviously something gnome-software is intended to avoid (and does a great job so far).