This is not supported right now, the other elements will not be part of
the layout, and two `for` will be in the same listview, creating bad
situation with the scrollbar.
This is a warning since it would be a breaking change to make it an
error.
For example, we used a FocusScope in the StandardListView implementation so
I had to go trough one level of indirection
CC: #860
* 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.
Now it's also possible to toggle checked by click on the text of the CheckBox similar to fluent design
GroupBox now respect the minimum width of the title, to avoid elision
Adopt SpinBox: set focus when buttons are clicked #1795 on md SpinBox
