HTML Page Revamps

[pJeyakumar]

• the /register page has some elements which are not aligned correctly
• the /file_details page should implement an accordion structure, which has sections of data which contain suspicious info initially open, and all other sections initially closed
• for the /login page, there should be feedback when a user enters an incorrect username/password.
  • some red text below the Login button saying "Incorrect username or password was entered."
• for the /scan_results page, there should be info-tips that explain what the file "scores" mean and what the coloured flags represent