When the transclusion editor is emptied out (e.g. by removing all the items), it should not just be blank. This looks broken and is confusing to the user (should I wait for something to appear? is it stuffed/errored out?)

There needs to be some kind of textual label in the empty transclusion editor, that makes two points:

1. that the user can click [+] to add something to the transclusion
2. that by clicking "apply changes", it will remove the transclusion

Version: unspecified
Severity: enhancement