add end of row indication for wrapped lines in debug.show_screen()
fix screen inconsistency on backspacing before an LF terminated row
bring behaviour of backspace before & after LF in line with GWBASIC
fixed numbers being printed over the screen boundary, now also for width 40 and width 20
don't show empty line after 80-column program line in LIST
fix setting pcjr_syntax option
fix crash on pcjr SOUND
fix setting pcjr_syntax option (2)
fixed SCREEN 5 memory model (BLOAD)
fixed debug trace()
fixed SCREEN 6 memory model (BLOAD)
tandy/pcjr: allow VIEW PRINT 1 to 25 if KEY is OFF
HELP: typo
assume font/ directory as default if font file not found
cursor color is attrib 3 for tandy graphics modes
HELP: updated cursor visibility in LOCATE; tandy VIEW PRINT 1 to 25
LOCATE: disabled cursor visibility effects, allow LOCATE 1,1,255 on Tandy
consistent intensity on cga palette switches
allow selecting low intensity cga with --cga-low
use correct PCjr/Tandy CGA palette (low intensity with bright white)