6.2.2 MOBILE: topic selector: a pulldown arrow in combo is misisng

1: OS / Browser:
Galaxy Tab2 7.0 android 4.1.1

2: Steps to reproduce
Load http://mf-geoadmin30i.bgdi.admin.ch/main/prod/mobile.html?lang=fr&topic=ech&X=190000.00&Y=660000.00&zoom=1&bgLayer=ch.swisstopo.pixelkarte-farbe&mobile=true

open catalog

3:Result
![screenshot_2013-09-09-13-13-44](https://f.cloud.github.com/assets/4577727/1112829/00c624b2-19eb-11e3-8427-641b73fa34c6.png)


Pulldown arrow in Combo "BLW" is missing


4. expected result:
make it obvious taht we have here a pulldonw combo