Issue #2893789 by szeidler, Kristen Pol: WidgetBase not using its own getFilteredDescription() helper method

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 #2791405 by alexpott, Thew, flocondetoile, eyilmaz, bsnodgrass, cilefen, aralnoth, xjm, mikeohara, jaybee@baelemans.eu, szeidler, Gábor Hojtsy, catch, gagarine, vaplas, claudiu.cristea, ckaotik, idebr: When installing a site in a language besides English, the site name is not saved and reverts to "Drupal"