c4b470685d
This PR shifts the design of checkboxes and introduces ways to style checkboxes based on Elevation, or tint them with a custom color. This may have some impacts on existing uses of checkboxes. When creating a checkbox you now need to call `.fill` if you want the checkbox to have a filled style. Before:   After:   Release Notes: - N/A |
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| .. | ||
| appearance.rs | ||
| color.rs | ||
| elevation.rs | ||
| platform.rs | ||
| spacing.rs | ||
| typography.rs | ||
| units.rs | ||