doc: autopts-linux: Add troubleshooting for window opening and closing

Refactored the structure of the troubleshooting section so it
is more similar to how e.g. the ArchWiki lists troubleshooting
entries, which makes it easier to search for and separate
each entry.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>

doc/connectivity/bluetooth/autopts/autopts-linux.rst

@@ -371,13 +371,15 @@ At the first run, when Windows asks, enable connection through firewall:
 Troubleshooting
 ****************
 
-- "After running one test, I need to restart my Windows virtual machine to run another, because of fail verdict from APICOM in PTS logs."
+After running one test, I need to restart my Windows virtual machine to run another, because of fail verdict from APICOM in PTS logs
+====================================================================================================================================
 
 It means your virtual machine has not enough processor cores or memory. Try to add more in
 settings. Note that a host with 4 CPUs could be not enough with VirtualBox as hypervisor.
 In this case, choose rather VMWare Workstation.
 
-- "I cannot start autoptsserver-zephyr.py. I always got error:"
+I cannot start autoptsserver-zephyr.py. I always get a Python error
+===================================================================
 
 .. image:: autoptsserver_typical_error.png
    :height: 300
@@ -393,3 +395,18 @@ One or more of the following steps should help:
 - Delete temporary workspace. You will find it in auto-pts-code/workspaces/zephyr/zephyr-master/ as temp_zephyr-master. Be careful, do not remove the original one zephyr-master.pqw6.
 
 - Restart Windows virtual machine.
+
+The PTS automation window keeps opening and closing
+===================================================
+
+This indicates that it fails to capture a PTS dongle.
+If the AutoPTS server is able to find and use a PTS dongle,
+then the title of the window will show the Bluetooth address of the dongle.
+If this does not happen then ensure that the dongle is plugged in, updated and recognized by PTS.
+
+.. image:: pts_automation_window.png
+   :width: 500
+   :align: center
+
+If it still fails to run tests after this,
+please ensure that the Bluetooth Protocol Viewer is installed.