VPS-50/fix image bug

[codecreator127]

Describe the issue

Buggy image upload in authoring tool

Describe the solution

Fixed save and close button to have a delay
Fixed uploadFile function in storage.js so that it returns a promise instead of just the url, so the image always gets uploaded first

Risk

Could break image upload

Definition of Done

• Code peer-reviewed
• Wiki Documentation is written and up to date
• Unit tests written and passing
• Integration tests written and passing
• Continuous Integration build passing
• Acceptance criteria met
• Deployed to production environment

Reviewed By

Who reviewed your PR - for commit history once merged

[JordanBlenn]

Checked by Jin and I :)