UI / UX Improvements

[itsmohmans]

• [x] Add back button across the app (this would help users when the website is in PWA mode)
• [x] Add tabs navigation in courses page to choose between categories with an 'All' option, it should update accordingly if the user has chosen a category from the homepage.
• [ ] Add carousel navigation for favorite courses on the homepage
• [ ] #25
• [x] #26
• [ ] Add a drop-down menu in Navigation bar to choose course category
• [x] Resource count in single course page
• [x] Sort list of files in the all files dialog by name
• [ ] Add indicator for the number of courses in the current list
• [ ] Add a search bar to the nav bar
• [ ] Add a new badge to new resources

[HDDTHR]

Suggestion: Add a counter to show the number of Notes/Exams in the form of a circle on the bottom right.

[itsmohmans]

It's already there in the course card, unless you mean in the resources page itself, then yes I'll add it