luci-app-travelmate: sync with update 1.2.4

* with the config option 'trm_radio' you can now restrict travelmate
  to a single radio (e.g. 'radio1') or change the overall
  scanning order (e.g. 'radio1 radio2 radio0')
* LuCI: show QR codes now inline on the overview page
  (collapsed by default)

Signed-off-by: Dirk Brenken <dev@brenken.org>