Update Editor.js (#1405)

Send along widget instead of this, new value cannot be fetched otherwise

Editor.js

@@ -474,7 +474,7 @@ define([
  // the latter is delayed by setTimeouts in Dijit and will fire too late.
  cmp.on(editOn ? 'blur' : 'change', function () {
  if (!cmp._dgridIgnoreChange) {
- self._updatePropertyFromEditor(column, this, {type: 'widget'});
+ self._updatePropertyFromEditor(column, cmp, {type: 'widget'});
  }
  });
  }