Display fly/worm donor constructs from calc fields

Now using the new model_organism_donor_constructs field to display fly and worm donor constructs, while still using constructs for human donors.
Merge branch '1187-donor-const' of https://github.com/ENCODE-DCC/encoded into 1187-donor-const
Separate donor information to its own panel

Still needs cleanup for characterizations, and experiment Jest test needs to be redone. Temporarily removed many tests from experiments-test.js; will redo and restore later.