clear-linux/turorials/flatpak: update tutorial

This commit updates the Flatpak tutorial to make use
of the gnome-software application and keep the command
line setup as well.

LibreOffice flatpak repository changed to Flathub.
This commit  updates the instructions to install it
as documented in https://www.libreoffice.org/download/flatpak/

Signed-off-by: Simental Magana, Marcos <marcos.simental.magana@intel.com>

source/clear-linux/tutorials/flatpak/flatpak.rst

@@ -32,82 +32,68 @@ Install and run the LibreOffice Flatpak image
 
 Application developers have the option to bundle their applications using
 Flatpak to allow the installation of a single distribution of their
-application on different distributions of Linux, including Clear Linux.
-Flatpak provides a `list of applications`_ available through Flatpak.
+application on different distributions of Linux, including |CL|.
+Flatpak provides a `list of applications`_ available through Flathub.
 
-Download and install the Latest LibreOffice Flatpak
----------------------------------------------------
+|CL| enables the Flathub repository by default.
 
-To get the latest version of the LibreOffice Flatpak repository, either
-`download it here`_ or you can enter the following command:
+
+Installing using gnome software
+-------------------------------
+
+All you need to do is to launch `gnome software`, search for the LibreOffice
+app and click the install button
+
+.. figure:: figures/01-install-libreoffice.gif
+   :alt: install libreoffice step by step
+
+   Figure 1: Installing LibreOffice using gnome-software
+
+
+
+Installing using the command line
+---------------------------------
+
+Open the `gnome-terminal` and type the following command to install the
+LibreOffice app.
 
 .. code-block:: console
 
-   $ curl –O -L http://download.documentfoundation.org/libreoffice/flatpak/latest/LibreOffice.flatpak
+   $ flatpak install --user flathub org.libreoffice.LibreOffice
+   Installing in user:
+   org.libreoffice.LibreOffice/x86_64/stable        flathub 2aff77bd5cf1
+     permissions: ipc, network, pulseaudio, wayland, x11, dri
+     file access: host, xdg-run/dconf
+     dbus access: ca.desrt.dconf, org.gtk.vfs.*
+     dbus ownership: org.libreoffice.LibreOfficeIpc0
+   org.libreoffice.LibreOffice.Locale/x86_64/stable flathub 924157b3b009
+   Is this ok [y/n]: y
+   Installing for user: org.libreoffice.LibreOffice/x86_64/stable from flathub
+   [####################] 403 metadata, 4661 content objects fetched; 222574 KiB transferred in 99 seconds
+   Now at 2aff77bd5cf1.
+   Installing for user: org.libreoffice.LibreOffice.Locale/x86_64/stable from flathub
+   [####################] 10 metadata, 71 content objects fetched; 1013 KiB transferred in 3 seconds
+   Now at 924157b3b009.
 
-The command downloads the latest LibreOffice.flatpak and saves it in your
-current directory.
 
-Once the download is complete, the next step is to install LibreOffice along
-with the runtime environment LibreOffice needs to execute. As mentioned on
-the `Flatpak website`_, with the release of Flatpak 0.8.0 and
-LibreOffice.flatpak 4.2.4, you no longer have to specifically install the
-runtime required to execute LibreOffice since it will automatically install
-the runtime referenced in the LibreOffice.flatpak file.
+Launch LibreOffice
+==================
+A new set of icons will appear in your Gnome applications list titled :guilabel:`LibreOffice.` To
+execute the application, highlight the application and click on the :guilabel:`LibreOffice` icon.
+LibreOffice will start normally.
 
-To install LibreOffice run the following command:
+.. figure:: figures/02-openlibreoffice.gif
+   :alt: Opening LibreOffice app
 
-.. code-block:: console
+   Figure 2: Select :guilabel:`LibreOffice` app
 
-   $ sudo flatpak install --bundle LibreOffice.flatpak
-
-The output from this command will look similar to the following.
-
-.. note::
-
-   You will be prompted to install the runtime environment if it is not
-   already installed.  Type :kbd:`y` to allow this task to execute.
-
-.. code-block:: console
-
-   GLib-GIO-Message: Using the 'memory' GSettings backend.
-   Your settings will not be saved or shared with other applications.
-   This application depends on runtimes from:
-   http://sdk.gnome.org/repo/
-   Configure this as new remote 'gnome' [y/n]: y
-   Required runtime for org.libreoffice.LibreOffice/x86_64/fresh
-   (org.gnome.Platform/x86_64/3.20) is not installed, searching...
-   Found in remote gnome, do you want to install it? [y/n]: y
-   Installing: org.gnome.Platform/x86_64/3.20 from gnome
-
-   Receiving delta parts: 0/11 2.5 MB/s 4.9 MB/223.2 MB 1 minutes 28 seconds
-   remain
-   Receiving delta parts: 0/11 2.9 MB/s 8.7 MB/223.2 MB 1 minutes 13 seconds
-   remain
-   11 delta parts, 84 loose fetched; 218002 KiB transferred in 17 seconds
-   Installing: org.gnome.Platform.Locale/x86_64/3.20 from gnome
-
-   5 metadata, 1 content objects fetched; 13 KiB transferred in 1 seconds
-   Installing: org.libreoffice.LibreOffice/x86_64/fresh from bundle
-   LibreOffice.flatpak
-
-Once the LibreOffice Flatpak application has been installed, you can launch
-LibreOffice with the following command from the command line:
+Using the command line
+----------------------
 
 .. code-block:: console
 
    $ flatpak run org.libreoffice.LibreOffice
 
-Add LibreOffice to your Gnome desktop
-=====================================
-A new icon will appear in your Gnome applications list titled :guilabel:`LibreOffice.` To
-execute the application, highlight the application and click on the :guilabel:`LibreOffice` icon.
-LibreOffice will start normally.
-
-.. figure:: figures/gnome1.png
-   :alt: Gnome desktop
-
-   Figure 1: Select :guilabel:`Gnome applications list`
 
 .. _Flatpak website: http://flatpak.org