Ensure that GS/pA background is set

src/freedombone-app-gnusocial

     # And doesn't forget logins
     gnusocial_use_qvitter gnusocial
 
+    if [ $GNUSOCIAL_BACKGROUND_IMAGE_URL ]; then
+        pleroma_set_background_image_from_url "$GNUSOCIAL_DOMAIN_NAME" "$GNUSOCIAL_BACKGROUND_IMAGE_URL" "$GNUSOCIAL_TITLE"
+    fi
+
     APP_INSTALLED=1
 }
 

src/freedombone-app-postactiv

     # And doesn't forget logins
     gnusocial_use_qvitter postactiv
 
+    if [ $POSTACTIV_BACKGROUND_IMAGE_URL ]; then
+        pleroma_set_background_image_from_url "$POSTACTIV_DOMAIN_NAME" "$POSTACTIV_BACKGROUND_IMAGE_URL" "$POSTACTIV_TITLE"
+    fi
+
     APP_INSTALLED=1
 }