SetScope(false) sent both 0x27 0x10 00 (scope DISPLAY off) and 0x27 0x11 00
(CI-V data output off), so quitting OpsLog blanked a local IC-7300's own scope
screen. Only the display-on (0x27 0x10 01) is now sent, and only on enable;
disable stops the CI-V stream alone and never touches the radio's display.
The multi-frame waveform header (USB path) read the second frequency field
as an absolute high edge, but in center mode it is a span — so high < low and
the panadapter had no valid range to map the trace onto (blank scope). It now
applies the same center+span vs low+high disambiguation the IC-7610 single-
frame path already used. FIXED mode was unaffected.
Also stamps changelog 0.20.10 with today's date.