Add EDITORNAME to common widget

*Fix #251 : widget added by editor only
Merge branch 'master' of github.com:Heigvd/Wegas

# By Benjamin Gerber
# Via Benjamin Gerber
* 'master' of github.com:Heigvd/Wegas:
  modify task and resource impacts
  Close #220
  conditionDisable now accepte serveur evaluation