Does not work if some choices are the same

[AlexeyKosov]

If not all choices (even on different levels) are the same, the plugin doesn't work since it requires that all labels must be unique.
For example, if both options exist in the list:

• Home > Kitchen > Appliances -> Blenders
• Electronics -> Appliances -> Blenders

there will be a bug because Appliances short label is ambigous.