Add a new Query.is_template field (default value 'no') to filter queries usable as template.
Also lots of modifications in ExtKeyWidget, both JS and PHP objects :
* pass filter on dialog content generation (was using only targetClass, so search criteria weren't set - but search results were ok as they are made from another ajax query)
* fix loading still displayed after dialog close
* can now get the defined attribute value (was always returning the selected object id)
c117a23e0d