Leaving the delete wallet or lost-password screen drops its wallet selection, but the settings gear had just pushed the screen onto the Back stack, so Back from Settings showed a screen whose button could only answer "No wallet selected for deletion." Each screen's leave handler now also takes it off the top of the stack, as the private key export and recovery phrase screens do since #461. Back from Settings then stays on Settings once, as it does for the recovery phrase screen. Jest tests drive the gear and then Back on both screens, and the delete screen's own Back. Model: opus-5-5