message: fix(GUI): throw a user error if the user is not in the sudoers file
  Change-Type: patch
  Changelog-Entry: Display a user-friendly error message if the user is not in the sudoers file.
diff: @@ -198,6 +198,13 @@ exports.elevateCommand = (command, options) => {
  // for now, we should make sure we double check if the error messages
  // have changed every time we upgrade `sudo-prompt`.
  + }).catch((error) => {
  + return _.includes(error.message, 'is not in the sudoers file');
  + }, () => {
  + throw errors.createUserError({
  + title: 'Your user doesn\'t have enough privileges to proceed',
  + description: 'This application requires sudo privileges to be able to write to drives'
  + });
  }).catch({
  message: 'User did not grant permission.'
  }, () => {
  