- Added `headCanWrap` stored property, and toggle button.
- CSS mods, cleanup.

- New glyphs for `icon-multiline` and `icon-singleline`.
- Refinements to button labels and titles for clarity.

- Add code and CSS for toggling single/multiline display of indicators.
- Add code to detect overflow state of indicators.

- WIP, but is working!
- TODOs:
  - Make sure this is a good way to do things.
  - Cleanup code.
  - Tests.

- Fixed CSS classing on collapse/expand button.
- New method added for storing head props in local storage.
- TODOs:
  - Make sure using Update hook is performant.
  - Tests.

…AppLayout.vue component.

- Code cleanup, console.log removals.