The chanOsc images needed an update because things moved a little.
The rest... is entirely because I wanted to see rounded window corners so there aren't ugly black corners when displayed on the white background of HTML or PDF.
* A whole mess of redone graphics.
* Minor adjustments and new ADSR chart.
* Android: warnings are errors
* GUI: sample editor warnings, part 1
* optimize images
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Co-authored-by: tildearrow <me@tildearrow.org>
