Use fontconfig to load fonts. Fonts can be added to the `fonts` map in
the config, and referenced from individual widgets' configurations for
customizability.
Fonts default to values "mono" and "sans" if nothing is set.
Use of DateTime<Local> can lead to excessive inspection of the system
timezone.
Instead, propagate only a timezone-compensated NaiveDateTime throughout
the widgets.
- Track "start" command internally as a special mode.
- Ensure that DoubleMemPool is in good state if draw bails.
- Ensure that Launcher does not terminate daemonized session.
- Ensure that size changes cause full force redraw.
1. Implement new layout API, replacing previous hard-coded layout.
2. Make the widgets (previously modules) configurable.
3. Split some widgets into smaller modules.
4. Configuration file (reluctantly JSON at time of writing).
5. More correct damage handling, copying damage to next buffer.
Hilmar Gústafsson