* Add endpoint to update user first and last name, password
* Add settings page that allows editing user details
* Respond with first and last name when user is updated
* Add 'Settings' item in the drop-down down for user
* Add newline for index.js of settings page
* Supply missing newlines
* Ask for current password inorder to change password
* Add end-point to change password
This commit also adds a Guard to ensure that the user reenters
existing valid password.
* Add e2e test for change_password endpoint
* Copy change for the toast presenting misentered current password while changing password
* Change password when enter key is pressed from 'new password' box
* Add newline and the end of password-revalidate.guard.ts
