[EPIC] Admin Pages changes

[G-Ambatte]

Your idea:

This issue is to track the progress of the changes to the Admin Pages and the related underlying systems.

• Fix Admin pages on live site - [SERVER] Fix Admin pages #2657
  • PR Fix admin pages #2657 #2658 raised and ready for merging
• Create Notification DB - [SERVER] Improved Messaging System #2585
  • PR Experimental notification DB #2586 in progress
• Create User Info DB - User settings #1908
  • PR [WIP] User Info #2474 in progress - currently outdated due to conflicts in app.js

[5e-Cleric]

#3264 refactored admin page functions to work with newer syntax, they are working again.