KRACOUES-7183:notes attachment tab

the idea of putting it here was that ideally i would add JPA annotation to the notes collection on the DocumentBase, (currently the notes collection is set to be transient) and it would be saved whenever the document was saved.  So i added it here instead.  I thought of putting it in the performAfterSaveLine, but wasn't sure if that would be appropriate, not sure if we want to put it on a save only on the attachments page?