MIDI Learn at Last

This version introduces the Seq66 flavor of MIDI Learn. See NEWS,
the Help menu, and the user manual. It works differently from other
implementations of MIDI Learn.

• MIDI Learn.
  • Control actions via keys and buttons have been added
    to augment MIDI Learn.
  • Remove the automation::slot::mod_LR_loop slot.
• Main window and song editor.
  • The time-display now cycles through B:B:T, H:M:S, and ticks.
• Pattern editor.
• Added "Jitter" to the pattern editor tools.
• Event editor.
  • Added a button to enlarge the pattern by one measure.
  • Replaced the "Ticks" check-box with a button to cycle through
    display of time in B:B:T, H:M:S, or ticks.
  • Fixes to some event handling, such as pitch-wheel.
  • Added filling in of some data depending on the event selected.
• Build system.
  • A missing "makensis" application no longer causes a build error.
• Command-line:
  • The --investigate option turns off the log file for easier
    debugging.
  • Added a --new option to avoid loading the most-recent
    file for the current run.
  • Fixed --help and --version abbreviations so that the application
    stops after, say, options --hel, for example.
• Miscellaneous:
  • Most of the 'qss' files have been tweaked.
  • The new "font-fix.qss" style sheet can be used to correct font
    sizes. Other style sheets have been updated, as well..
  • Beefed up the tool-tips.
  • Changed the shortcut (accelerator key) for Import / Project
    Configuration from Ctrl-J ("LF") to Ctrl-G ("BEL").
  • Fixed some notable errors. See "Fixed" in NEWS. Also
    fixed quite a few minor errors.
• Documentation updated to explain the MIDI Learn Manager.