After copying the short name of a field in the publish form, it becomes impossible to copy the content of the field

[shbchk]

EE 7.4.1

Steps to reproduce:

1. Open a publish form (edit an entry) using a superadmin account.
2. Click on the "copy" button next to a field's short name.
3. Attempt to copy the content from the field.
4. Paste it somewhere else - you will notice that what gets pasted is the field's short name, not its content.