XML snippet per inscription

[simonastoyanova]

Create a button in the Annotator tab for each inscription which produces a short snippet of XML with a list of the letter types and their URIs present in that inscription.
@geoffroy-noel-ddh, I spoke to Jonathan today and in the interest of time we would like to include those XML snippets in the handNote of each file we have in the annotator, whether it has some text there or not. In terms of structure I'm thinking of the following:

<p>Types list:
<ref target="......">A type 1</ref>
<ref target="......">B type 3</ref>
</p>

etc.
We may not have time to go over and write some commentary but the list will still be useful for people and provide the link between the palaeography project and the main corpus.