Steps to reproduce:

1. Create a template with just one item
2. Create a seconde template that inherits from the first one
3. Create a dependent item in this second template
4. Create a trigger analyzing this dependent item
5. Export the second template

Result:

when importing, an error is displayed for the trigger that the key is not found, this is because the master item is not exported, neither the dependent item

Expected:

1. when exporting display a message informing that the item will no be exported
2. also do not export the trigger, with also an error message