Fix fr:xforms-inspector after cab2fd30779b351d0fc13be323071d05cc69c504

- remove usages of 2nd argument to xxf:instance() in fr:xforms-inspector
- xxf:list-instances and xxf:list-models
  - move to Scala
  - update  to return / take absolute ids
Make dropdown wider to allow for title item
Make dropdown even wider to allow for title item in French