These job plugins work similarly to view modules, with the following
differences:

* These jobs need to link only libcalamares, not libcalamaresui. For
  this reason, PluginFactory was moved from libcalamaresui to
  libcalamares. (It depends only on QtCore.)

* Instead of deriving from ViewModule, derive from CppJob (which is a
  subclass of Job).

* Like process and Python jobs, a job plugin is a single job, whereas a
  ViewModule can generate a whole list of jobs.

The CppJob and CppJobModule classes are new. In Module::fromDescriptor,
the combination type=job, intf=qtplugin is now supported and mapped to
CppJobModule.

locale -a returns the locales using ".utf8" names rather than ".UTF-8".
The case-insensitive match does not help because it is "utf8" rather
than "UTF-8". So we need to match both with and without the dash.

Revert "Merge upstream changes"

Merge upstream changes

Merge upstream changes

The arrow no longer changes direction depending on whether
the button is clicked or not.

The button is "not checked" by default, and becomes
checked when clicked; the packageview becomes visible
when the button is checked.

Merge upstream changes

CAL-385 #close

CAL-390 #close

Pass the full name directly to useradd instead, using the "-c" (comment)
parameter, which is "currently used as the field for the user's full
name" according to the documentation.

The chfn utility is no longer installed by default on current Fedora
releases due to its dependency on libuser. (They split out chfn and chsh
from util-linux into an optional subpackage.) It could be added as a
dependency of Calamares, but since it is needed inside the chroot, it
has to be on the base live image, not the overlay. Thus, to allow
testing Calamares with a simple "dnf install calamares" again, the
dependency needs to go away. And it is unnecessary anyway.

Merge upstream changes

* Fix spelling mistake in kdsingleapplicationguard.cpp

s/emty/empty/g.

* Add fdo keywords

Add freedesktop.org keywords to desktop entry.

This allows users to search for the app in various desktop environments.

For more details, see:
    https://specifications.freedesktop.org/desktop-entry-spec/latest/ar01s05.html,
    https://bugs.debian.org/693918, and
    https://wiki.gnome.org/Initiatives/GnomeGoals/DesktopFileKeywords for

s/emty/empty/g.

Use device's immutable copy instead of rescanning.