LDEV-4233 added confirmation dialog asking whether teacher wants to proceed with hiding user as it will lead to removal of this user's ratings and comments
LDEV-4228: Updated double submission handling to match other tools done recently for LDEV-4208. Buttons are disabled after validation and notebook is fixed.
LDEV-4228: Disabling submission buttons when user uploads a file, adds a URL or tries to go from screen to screen to stop double submission. Also remove javascript that is no longer needed (and in some cases doesn't work anyway).
LDEV-4226: Disabling submission buttons when user tries to go from screen to screen. Also tidied up the bootstrapping changes on the Other Users Results screen.