Feed and My Shows rows could grow to 4+ lines when a long title was
shrunk by the current pane: flexible text wrapped instead of
truncating, shifting every row below while scrolling. Add
wrapMode=none + truncate to flexible text and flexShrink=0 to
fixed-width cells so rows stay one line tall. Feed rows also move
the podcast name onto its own line. Adds a rendered-layout
regression test at 70 columns (35-col current pane).
