EN-219: Tc/change password requirements

What I did:

• Change password requirements of these components: PasswordReset and PreferencesBox
• Fix layout and styling bug in PasswordReset component
• Temporary disable the warning of getAuthStatus in PasswordReset and add TODO keywords to some task-related comments
• Change fireEvent.blur() to fireEvent.blur() (focus + blur). I made this change in the two failed frontend test files with the hope to fix them but found out some unexpected behaviours of the password confirmation components. Tom's working on this task so I'll let him fix this

Edit:

• Change colours of buttons and text fields to black, and big check icon to salmon
• Fix inconsistent layout of the success pages (pages with the big check icon)
• Fix Login failed tests