Upgraded dashboard UI for DoNotes & Cada

• Includes welcome message

• Includes scenic landscape photo

Added tasks to DoNotes

If you accidentally leave a page whilst doing a quiz, it will save your progress

Updated bottom toolbar for mobile users

Bugs/errors are now auto-logged to Cognitive HQ

Add a math symbol dropdown to DoNotes

Fixed a bug that caused notes created in the dashboard to not be able to load until the user refreshed the page