The host picker reused the composer trigger's content-width pill, so its
label sat 6px left of the section rows and the chevron hugged the label
instead of the trailing edge. Add a `block` mode to ComboboxTrigger that
fills the width and uses the sidebar-row gap, and size the status dot to
the icon footprint so the label and chevron line up with the rows below.
Mohamed Boudra
0d1c8db87d