Disable "refresh as typing" while authoring WebAppNode.
Disable Step Preview while authoring WebAppNode.
Cleaned up WebAppNode code by removing console logs and prompt-related code.
Merge branch 'master' of https://github.com/WISE-Community/WISE

# By breity
# Via breity
* 'master' of https://github.com/WISE-Community/WISE:
  Updated tinymce removal call when closing step content authoring pages (update to tinymce v4 method)