* Editor: Make pitch expand/shrink also work on pitch
  changes, not just on the main pitch of notes.
* Editor: Shorten the main popup menu a little bit.
* Editor: Fix editing the value of a pitch change.
  I.e. left alt + return when cursor is placed on
  a pitch change for a note.
* Playlist: Clean up popup menus a little bit.
* Playlist: Make it possible to configure the color
  of the border of current entries.
* Playlist: Split the concept of current blocklist
  position and the concept of current block, making
  it convenient to change playlist while playing
  song. I.e. current block is not always the same as
  the current blocklist position anymore.
* Playlist: Clean up various things.
* Editor: Fix possible glitch in sound when cutting
  the length of a note while playing.
* Playlist: Make "C" keybinding change color of
  highlighted block or audiofile if mouse pointer is
  currently pointing inside a block or an audiofile,
  also in the blocks browser in the playlist for
  instance.
* Playlist: Light up playlist entries when mouse is
  above.
* Playlist: Select current seqblock under mouse when
  mouse is above a playlist entry. This is practical
  when assigning keybinding to e.g. change block
  color.
* Playlist: Add popup menu option to set current
  seqtrack.
* Sequencer: Fix some unnecessary jumpingaroundness
  when moving seqtracks up and down.
* Sequencer: Fix changing timing mode
  unintentionally when changing seqtrack order.
* Sequencer: Don't create undo when changing
  seqtrack order but ends up with the same order as
  before.
* Linux: Fix space and return key not working, for
  some reason, on Ubuntu 20 and probably other
  distributions.
* Sequencer: Don't show error message when trying to
  swap last seqtrack with next seqtrack.
* Sequencer: Fix dragging seqtrack number up and
  down when there are invisible seqtracks.
* Modular mixer: add the "Mixer" submenu to the
  bottom of the effects popup menu.
* Mixer: Clean up the various "Insert plugin" menus.
* Editor: Clean up the top of the "(click me)" menu.
* Editor: Add the timing tracks popup menu submenu
  to the bottom of the bars/beats popup menu.
* Modular mixer: Fix module positioning when loading
  .mrec files.
* Ladspa: Include the name of the audio input and
  output ports in the info box.
* Sampler: Fix integer overflow problem in code to
  generate waveforms. This fixes (rare) situations
  with no waveforms in the editor
* Mixer: Add "Create new bus" option to the top of
  the list of buses you can send to when selecting
  "Insert send".
* Mixer: Add "New bus" option to the main popup menu
  in the modular mixer.
* Mixer: Tweak the "New sound object" / "New audio
  instrument" menu.
* Sequencer: Change "Set name" to "Rename" in the
  popup menus.
* Playlist: Fix block names not being updated when
  editor blocks are renamed, and other situations.
* New song: Hide signature track, tempo automation
  track, and swing track.
* Editor: Automatically (and continously) resize all
  tracks to fill all available space for clean
  projects.
* API:
  * New: getSeqtrackUuid,
    setCurrEditorBlockUnderMouseForSequencer,
    getCurrEditorBlockUnderMouseForSequencer,
    setCurrSampleUnderMouseForSequencer,
    getCurrSampleUnderMouseForSequencer,
    getCurrBlocklistPos, setCurrBlocklistPos.
  * setUsingSequencerTiming gets optional argument
    'make_undo'.