[T12 live or installed] needs package 'mtools' to be able to deal with FAT32 EFI partition in GParted

Without GNU mtools installed, GParted cannot manage FAT partitions, like the EFI boot partition. It should be installed by default in the live ISO.

 $ apt show mtools
Package: mtools
Version: 4.0.43-1build1
Priority: optional
Section: otherosfs
Origin: Ubuntu
Maintainer: Ubuntu Developers <name at domain>
Original-Maintainer: Debian QA Group <name at domain>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 399 kB
Depends: libc6 (>= 2.34)
Suggests: floppyd
Homepage: https://www.gnu.org/software/mtools/
Task: xubuntu-live
Download-Size: 197 kB
APT-Manual-Installed: yes
APT-Sources: http://trisquel.c3sl.ufpr.br/packages ecne/main amd64 Packages
Description: Tools for manipulating MSDOS files
 Mtools is a collection of utilities to access MS-DOS disks from Unix without
 mounting them. It supports Win'95 style long file names, OS/2 Xdf disks,
 ZIP/JAZ disks and 2m disks (store up to 1992kB on a high density 3 1/2 disk).
 .
 Also included in this package are commands to eject and manipulate the
 write/password protection control of Zip disks.