Prevent qtox from being opened more than once

src/freedombone-image-customise

     chmod +x /home/$MY_USERNAME/Desktop/Users.desktop
     chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/Desktop/Users.desktop
 
-    if [ ! -f /home/$MY_USERNAME/Desktop/tox.desktop ]; then
+    if [ ! -f /home/$MY_USERNAME/runtox ]; then
+        echo 'qtox_running=\$(ps aux | grep qtox | grep data)' >> /home/$MY_USERNAME/runtox
+        echo 'if [ \${#qtox_running} -eq 0 ]; then' >> /home/$MY_USERNAME/runtox
+        echo '    bash -c "qtox -p data"' >> /home/$MY_USERNAME/runtox
+        echo 'fi' >> /home/$MY_USERNAME/runtox
+        echo 'exit 0' >> /home/$MY_USERNAME/runtox
+        chmod +x /home/$MY_USERNAME/runtox
+        chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/runtox
+
         echo '[Desktop Entry]' > /home/$MY_USERNAME/Desktop/tox.desktop
         echo 'Name=Tox Chat' >> /home/$MY_USERNAME/Desktop/tox.desktop
         echo 'Type=Application' >> /home/$MY_USERNAME/Desktop/tox.desktop
         echo 'Comment=Chat, VoIP and Video' >> /home/$MY_USERNAME/Desktop/tox.desktop
-        echo "Exec=bash -c 'qtox -p data'" >> /home/$MY_USERNAME/Desktop/tox.desktop
+        echo 'Exec=bash /usr/$MY_USERNAME/runtox' >> /home/$MY_USERNAME/Desktop/tox.desktop
         echo 'Icon=/usr/share/icons/hicolor/32x32/apps/qtox.png' >> /home/$MY_USERNAME/Desktop/tox.desktop
         echo 'StartupNotify=true' >> /home/$MY_USERNAME/Desktop/tox.desktop
         chmod +x /home/$MY_USERNAME/Desktop/tox.desktop