[FIX] hw_drivers, hw_posbox_upgrade: IoT Box fixes

- The upgrade page shows the last commit that is present on the box. If
the message commit was too long, the layout was broken.

- In the latest version of Raspbian, when no display is connected to the
HDMI port, `tvservice -n` finds a display named "Unk-Composite dis".
Therefore, the `distant_display` was not created.

--
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

closes odoo/odoo#37044

Signed-off-by: Quentin Lejeune (qle) <qle@odoo.com>

addons/hw_drivers/controllers/driver.py

@@ -296,8 +296,8 @@ class Manager(Thread):
 
     def get_connected_displays(self):
         display_devices = {}
-        hdmi = subprocess.check_output(['tvservice', '-n']).decode('utf-8')
-        if hdmi.find('=') != -1:
+        hdmi = subprocess.check_output(['tvservice', '-n']).decode('utf-8').replace('\n', '')
+        if hdmi.find('=') != -1 and hdmi.split('=')[1] != "Unk-Composite dis":
             hdmi_serial = sub('[^a-zA-Z0-9 ]+', '', hdmi.split('=')[1]).replace(' ', '_')
             iot_device = IoTDevice({
                 'identifier': hdmi_serial,

addons/hw_posbox_upgrade/views/upgrade_page.html

@@ -63,7 +63,7 @@
         <div style="padding-bottom: 5px; font-weight: bold;">
             Latest patch:
         </div>
-        <pre style="margin: 0;padding: 15px 0;">{{ commit|safe }}</pre>
+        <pre style="margin: 0;padding: 15px 0; overflow: auto;">{{ commit|safe }}</pre>
     </div>
     <div class="text-center" style="margin: 15px auto;">
         <a class="btn" href='#' id='upgrade'>Upgrade</a>