ProTracker 2 clone v1.23

• PAT2SMP now has higher quality sound. Especially noticable in LO mode
• PAT2SMP LO mode now uses 20864Hz (E-3 finetune 0) instead of 22168Hz (F-3 finetune +1) for slightly more room, and still has better quality than before because of the improvement above!
• The optional 2x downsample during sample load is now of better quality. Or it should be, at least...
• Fixed some bugs in the "sampling" screen (SAMPLER screen -> Sample)
• The sampling feature now takes up less CPU time while downsampling. Also fixed a small error in the sinc resampling interpolation
• Don't block GUI input and don't show red mouse pointer for a while every time you cancel a requester. No idea why PT did this in the first place, what a workflow limiter!
• Bugfix: Don't reset playback time counter on "play pattern"
• protracker.ini: "A500LOWPASSFILTER" has been replaced with "FILTERMODEL" (A1200 or A500). Removed NORMALIZESAMPLING and SAMPLELOWPASS (deprecated).
• Some other minor changes not worth of a mention
• Code cleanup