1.19.4 (unstable):

* Calculated fields and button scripts:
  - Properly return boolean results.
  - Initialize pygobject, to fix the use of the PyRecord API.
* libglom: Added utils::build_sql_select_count_rows().
* Fix crashes when using choices with fixed lists.
* Do not crash if PyDateTime_IMPORT fails.
* Remove some unnecessary padding/borders around the main window.
* Main window: Use a custom Notebook-like widget instead of Gtk::Notebook.
* CSV Import: Fix quoted-newline detection, so we don't drop rows.
* Use the new Gtk::ComboBox CellArea API to align columns properly.
* Build:
  - Depend on libgdamm-5.0 instead of libgdamm-4.0.
  - Remove the dependency on pygda, though we now check for
    gi.repository.Gda at startup instead.
    It is provided by libgda-5.0 (currently 4.99.x).
  - Require the latest mm-common and dist the mm-common scripts.
  - Require the latest gtksourceviewmm