[Change #1134] Add disk activity indicators for drives in Slot 5.
Only visible in 2x Windowed mode.
Add a new UI toggle in Config->Disk tab to "Show status" (ie. the track/sector status).
Hovering over this status will show a tooltip with both decimal and hexadecimal values, and the track includes the full fractional quarter track value too.
[Change #1133] Add a new command line '-s diskii13' to put a diskii card into slot-n and force it to use the 13-sector firmware.
[Bug #1157] Fix video junk on RHS edge for TV & Monitor video modes. (Regression at 1.13.11.0)
[Bug #1144] Fix some ZP symbols in A2_BASIC.SYM.
[Bug #1143] Fix graphical glitches on penultimate scan line when in non-"50% Scan Lines" mode.
[Bug #1138] Fix Mousecard - wasn't generating VBL interrupt for mode byte of $08. Fixes 'Jeeves'.
[Bug #1131] Fix MIXED issue when in 'Color (PAL Monitor)' video mode.
Change: Extend the debugger to support DISK commands for Disk II cards in other slots: