Calamares uses the settings as per /etc/calamares/settings.conf with the
installer. These settings consist of all the important modules that are
to be loaded from the launch of the installer till the end. The order in
which these modules should be loaded is also important.

Fix the ordering of the modules as per they'll be needed in the
installation process following Debian's settings procedure. Add the
missing modules because of which the installation with EFI system
partitions fails (introduced in commit 08d5ee8d).

Add missing mount-media-chroot module to calamares-modules to complete
the desired installation procedure.

Side-effects: None known so far
Tested: OK