Added Super User Functionality

[ntrehan]

Fixes #1747

What changes did you make and why did you make them ?

• Disabled the ability to edit anything of the super user in the super user page
• Added a new access level "superadmin" in the User Model
• Some CSS changes to reflect that the buttons are disabled for a superadmin
• Corrections from previous PR, "VRSM Admin" changed to "VRMS Admin" and the whole row is in one line
• Please note that I promoted "mamoleo@gmail.com" to superadmin in vrms-test just for testing purposes

Screenshots of Proposed Changes Of The Website (if any, please do not screen shot code changes)

Visuals before changes are applied


Visuals after changes are applied


[trillium]

I approved the pull request, but can you please change the word function to boolean in the comment you provided

[trillium]

Merged!