Introducing two new colors:
- ColorTheme::color_dim, for dimmed/disabled primary colors
- SurfaceTheme::opaque_widget, for buttons.
In material design, a button's background color uses the Highest
Container role, which seems incorrect because then buttons wouldn't have
a different color when placed inside of the highest level container.
Rather than remove a container level, I added one more tone using the
neutral variant.
Other changes are just gut feelings to have a slightly richer dark
theme. I feel like material is a little muddy in dark mode.
I started making more changes, and I lost track of what was merge
related and what wasn't, so I committed the merge with what was staged,
but it probably didn't compile.
This is the remaining changes to get things back to a state I'm happy
with, mostly tweaking the constrast behavior.
This also means that if an animation is animating over discrete values
and the actual value has not changed, the Dynamic will no longer detect
a change because it's now using update instead of set.
measure() now is layout(). LayoutContext can either persist layout
information or be used temporarily for measurement. While this caching
is constantly thrown out currently, this is a step towards being able to
only re-layout widgets if they've been invalidated.
