- Centered justification in UI
- Web read/write
- Ship with default setup
- Set grid
- Math evaluation field

DONE:
- Fix -vet errors
- When there is no matrix it should still draw the rectangle
- Always show coordinates
- Web build
- Escape closes dialogue if on dialogue. Otherwise stops program if on desktop, but not without an unsaved changes warning.
- Set animation value
- Snap to grid option