clear list when re-requesting autocomplete
language in html added
Merge pull request #2 from mapbender/hotfix/autocomplete-clear-list

Clear list when re-requesting autocomplete
Form theme: Keep index for collection as data attribute
Merge branch 'develop' of github.com:mapbender/fom into develop
Form theme: Collection items get UUID ids
Enhanced autocomplete widget

- Added delay option which will wait before starting a query after each
  key hit.
- Added event triggering when entry has been selected.
- Made index attribute optional, falling back to simple index
Merge branch 'develop' into feature/popup-resizable
popup designfixes; resizeable;