Add option to print 'Collector+Collector' number on annotation labels

[fbungartz]

Sorting annotation labels to match the specimens that they belong to is currently only possible by adding the catalog number to the annotation label.
But not all specimens necessarily always have a catalog number. For many specimens it would be very useful to be able to match annotations not just by 'Catalog Number', but also the 'Collector + Collector Number'.
Please add an option to also print 'Collector + Collector Number' on annotation labels.

[themerekat]

This wish list item has been documented here! #751