Explore only reached search through an app-bar icon that pushed a separate
screen. Touch and pointer builds now carry the field inline under the app
bar: results replace the shelves while the query is non-empty and the
shelves return when it clears. TV keeps pushing CatalogSearchScreen, since
a text field cannot share the spotlight scaffold with the bottom-pinned
browse rail and the on-screen keyboard.
Pull-to-refresh and the toolbar refresh action re-run the live query
instead of reloading hidden rows, and switching catalog source re-runs the
query against the new source rather than leaving the previous source's
results under its name.
edde746
9a0e96114f