This is commit is just the output of running the syntax updater on the
files in the internal/compiler/widgets directory.
No extra manual steps were done.
Note: In order to run the updater, I did a hack so that the updater wouldn't
choke on internal item used by the styles by commenting out the check in
ElementType::lookup_type_for_child_element
* Add `StateLayer` component
* Add `Ripple` component (used by StateLayer)
* use `StateLayer` in material `Button`
* use `StateLayer` in material `Item`
* Apply the "Roboto" family by default to the Window.
* Don't use "Roboto XXX" as that is not the name that's encoded as family name in the TrueType fonts. The variants should be chose based on the weight, not the family name.
* Don't apply the font family in the MD's LineEdit - that should not be necessary anymore.
