ADD a "Save all" button in the add question page

[YinWang3026]

Is your feature request related to a problem? Please describe.
As a TA, I would like to have a "save all" button, so I don't need to go through each question and click save one by one.

Describe the solution you'd like
Add a button that saves all the questions.

Describe alternatives you've considered
N/A

Additional context
N/A