Provide a way to filter observations by disputed IDs

Update to those February links I offered

Pre-Mavericks for Pennsylvania has grown to almost 9K

We have abandoned the archive for resolved pre-mavericks and moved on to Placeholder Backup with 19K. (Hoping that since the new app has no placeholders, in time, we will get a better solution from iNat for website too)

Disagreements held at Plantae for Pennsylvania has also crept up to 250.