Edit Quiz: Prevent the page from jumping around when reordering a question toward the bottom of the list
Edit Quiz: Show question number within placeholder when reordering questions
Edit Quiz: Prevent jumpiness when removing last question
Edit Quiz: Minor tweaks for question reordering

- Hide any ckeditor toolbars when starting reorder by removing focus from any input elements
- Update form height if question settings are opened (so as to prevent any potential jumpiness when reordering later)
Temporarily remove node_nodules from gitignore to fix an issue with deploying to heroku