`AdwClampLayout` constraints the size of the widgets it contains to a given maximum size. It will constrain the width if it is
horizontal, or the height if it is vertical. The expansion of the children from their minimum to their maximum size is eased out for a
smooth transition.
If a child requires more than the requested maximum size, it will be allocated the minimum size it can fit in instead.
Each child will get the style classes .large when it reached its maximum size, .small when it's allocated the full size, .medium
in-between, or none if it hasn't been allocated yet.