Hangar: no more accidental dismantling. The dismantle button used to appear below “Upgrade” right after your first upgrade; since the bottom of the panel is pinned in place, “Upgrade” shifted upward when it appeared, and anyone who left the cursor sitting on the button and clicked again for the next rank ended up dismantling the upgrade they’d just bought. The dismantle option is now a small icon button next to “Upgrade” instead, with its spot always reserved so nothing shifts when you buy something. What it refunds is shown in the tooltip.