additional display columns in Attachments macro

On behalf of our 4500 users of our Confluence instance, we would find it extremely useful to be able to configure the Attachments macro with additional columns - notably "Labels" 

Some of our Spaces use a lot of attached documents which they currently record manually in a table on the main page - this is so they can put a column in with a manually assigned document number to the attachments for reference purposes - this is common practice in many of the engineering companies (as is our global engineering industry User base) as it adds some consistency in their documents management platforms regardless of ad-hoc file names from various sources.  They can therefore search for a document number and sort the table by the column headings.

If the Attachments macro had the ability to show the Labels column, then they could use Labels as the document reference number.  They could sort by the Label column and even use normal Ctrl+F in their browser search to find what they are looking for.

Other configurable columns would be the name of the last User who uploaded the last document version, and of course last version date.