See and manage sidelined sessions (instances)

When you step into an instance, Haul sets your current farming session aside so instance loot doesn't mix in — but that sidelined session then disappears from view until you leave, and you can't do anything with it. This surfaces sidelined sessions in your session list, clearly marked, with the option to merge one back into your active session. It also becomes the place to see and un-ignore sessions Haul set aside — including "instances" that aren't really dungeons (like the Community Feast) that probably shouldn't be set aside at all.