. In 2x windowed mode: always show slot 5 Disk II LEDs.
. Add tooltips for slot 5/6 track/sector info (d1 & d2) - shows dec/hex & fractional track position.
- but this track/sector info is now on a UI toggle in the Config -> Disk tab.
. Debugger: add 'DISK SLOT n' - to set current slot of Disk II card
- ie. support 'DISK INFO' for slot 5