v2.4.4

- [partition] remove sgdisk dependency
- [displaymanager] use configparser and add better autologin handling
- [displaymanager] set a preferred Xsession for autologin
- [netinstall] Support selecting visible groups by default
- [packages] Add option of updating packages db before perfoming package operations
- [packages] Allow try_install and try_remove entries in packages module
- [unpackfs] Do not fail if rsync returns exit code 23