PHRAS-752 #time 4h

fix : tf-* (phraseanet) admin / field / source does not says "invalid"
add : better completion for field source : now can type things like "phr:tim" to match namespace(s) and tagname(s)

lib/classes/databox/field.php

@@ -468,7 +468,7 @@ class databox_field implements cache_cacheableInterface
         }
 
         try {
-            return TagFactory::getFromRDFTagname($tagName);
+            return TagFactory::getFromTagname($tagName);
         } catch (TagUnknown $exception) {
             if ($throwException) {
                 throw new NotFoundHttpException(sprintf("Tag %s not found", $tagName), $exception);