Issue #2788777 by alexpott, bircher, jribeiro, Eli-T, mpotter, douggreen, GoZ, DamienMcKenna, Dane Powell, jibran, szeidler, Alumei, andypost, dawehner, johndevman: Allow a site-specific profile to be installed from existing config

Issue #2349565 by tengoku, jhodgdon, jribeiro, susanb, batigolix, no_angel, megansanicki: Review/update block_content hook_help text