AppChooserDialog should not remove URL scheme

[sersorrel]

AppChooserDialog currently truncates URLs to 40 characters for display:

https://github.com/flatpak/xdg-desktop-portal-gtk/blob/dcbc052bd5ba9816b6ac8d8a6b6e562a27b6685d/src/appchooserdialog.c#L296-L300

This is to avoid extremely long URLs making the window very wide – obviously this wouldn't be desirable:

but the current state of things isn't really great either; if your problem is that you lack an app for dealing with a special URL scheme, you have no idea what the scheme is:

Would truncating the string by removing characters from the middle be possible instead?

Alternatively, could the entire URL be displayed, but wrapped onto multiple lines?