update style for edit profile page

Implemented showing subscriptions on profile page, and allowing subscribe and unsubscribe on the lab page'

implement add opening (if professor)
implement opening popup

fix bug - select major on professor signup

Adding lab popup

See merge request !1

update login / signup functionality
add delete buttons based on user role / logged in (need to implement TODOs for actually deleting
create ProfilePage.tsx
fetching user based on role/name/email etc

remove LoginContext.tsx
update UserContext.tsx to handle all login attributes
student user commenting fully implemented

update AppHeader.tsx to show links based on user role.
update sign up pages to send the correct backend information.
update DiscussionPopupForm.tsx to use LabContext (less repetative code).

update css for labs filtering
clean up code (use contexts/services more)

edit utils.ts
add CollegeContext to main

edited types.ts
add signupapi to utils.ts
add key to labslistitem

remove unnecesary props
create context for login and discussions

create services
update signup student to select major