choose better icons for depending objects

[mfrasca]

the way it works now: you get a results row, it has a search button;

you click on it, and the client asks the server what objects are linked to the one in question, and you get as many buttons as the collections.
it may be: Taxon, Accession, Plant, Location, Contact.
once you get the 'depending' collections, you can click on the icon and the collection unfolds.
what we miss:

• choose a better icon for each category
• make sure that the icon of the unfolded collection looks different than when folded.