Log Message:
audio/fasttracker2: Update to 1.61

Changes since v1.58

v1.61 - 07.11.2022
- For the volume column in pattern edit mode, allow the two keys to the left
  of backspace to work as '-' and '+'. This is for some keyboard layouts where
  it was impossible to insert volume slide down/up effects.

v1.60 - 11.10.2022
- Windows/macOS: Updated SDL to v2.24.1

v1.59 - 03.10.2022
- The default Disk Op. directory is now set to the user's desktop
- The WAV export screen now has a checkbox for setting BPM precision to FT2.
  This means to use less precise BPMs, which will match FT2's WAV output
  length.
- The default audio frequency and bit depth in the WAV export screen are now
  set to 44100 and 16-bit, and changing the audio frequency and bit depth in
  the config screen will not affect these settings anymore.
- Updated the help text (made a note about the new WAV export BPM mode)