Bootstrap it's currently too bloated and follows a very "normal" standard design so it requires a lot of tweaking in local .css files, not to mention some properties this project will never use.
Materialize is a CSS library based on Material Design, the same design scheme that POP uses, initial migration may break some things and could take some time to fix broken changes.
The student-panel-groups.php file should contain a user photo in the top right corner that allows the user to modify it's profile or log out of Drapery, however I think some JavaScript is missing or something in the HTML tabs is wrong.
The cancel button in the signup.php file should take the user back to the main index.php file, however the "action" tag does not redirect the user to the current page.
Due to time & convenience reasons, current contribs will be limited before 11/21/2018. Past that time I will turn this repo private to keep contributing myself. This change is temporary and repo will resume it's public status in 12/1/2018.