plugin.getDefNoteFn
The 'getDefNoteFn' function returns file name of the default content of each info items. It is hard-coded as a constant string (i.e. '~~_notes.html'); myBase stores item content in this special attachment file, in order to distinguish from regular attachments;
- Prototype: plugin.getDefNoteFn();
 - Parameters: None.
 - Return Value: the hard-coded constant string '~~_notes.html'.
 - Example: 
alert(plugin.getDefNoteFn());