Inside the rail, the full-width search field wrapped on phones and left
the filter icon alone on a line above it, and the shared FilterBar grew
a class override and a second layout rule to make room. The search
field now sits next to the unchanged rail: above it on phones, where
the pills keep the usual scroll row, and in one line with it from sm
up. FilterBar and docs/ui-guidelines.md are back as they were, so the
filter-bar grammar stays the one ui-standards.md defers to.
Marc-André Bombeck
04a4353e50