Patch closing out the Nova megabar breakout under touch density (#31).
Fixes
- Breakout box now sits flush at touch density. The earlier fix was calibrated for normal density; touch makes the toolbar row taller, so ~1px of the breakout stayed visible after the first Esc.
Why it needed its own rule
The overhang correction is a fixed pixel offset (bottom), and touch density shifts the geometry it was measured against. Firefox flags the state with uidensity="touch" on the root, so only the touch case gets a 1px-tighter pull - normal and compact density stay untouched.