[GeoNetwork-users] checkbox and its label alignment

I have GN 2.10.3, and added a checkbox group to advanced search in SearchApp.js. However, it is found that the checkbox and its label is not align properly: the checkbox appears at the left top and the label appears on the right bottom. How can I control the alignment? I tried "style" and "lableStyle", but they seems no effects. or maybe I did not play it properly.

any one can help on this? or point me to a working example? Thank you very much.