UI enhancements: preserve cursor state, true freq display, feed symbols to external program, time scrolling#244

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psychogenic wants to merge 10 commits intomiek:mainfrom

psychogenic:main

Commits on Aug 28, 2025

Squelch for frequency plots
psychogenic
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Hotkeys: precise cursor settings, instant frequency plot, key scrolling (2 speeds) and program exit
psychogenic
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Time display and delta calculation: ctrl click and drag/release, or ctrl click then ctrl+shift click to see time calculations
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Commits on Aug 29, 2025