Issue #2474017 by pguillard, Cameron Tod, subhojit777, BQari, casivaagustin, colorfield, evgeny.chernyavskiy, wingmanjd, darol100, ifrik, jhodgdon, joshi.rohit100, Gábor Hojtsy, catch: Improve module description and error message about missing Curl library

Issue #202783 by evgeny.chernyavskiy, jrdixey, YesCT, subhojit777, adinac, jeet09, gaurav_varshney, alansaviolobo, Devin Carlson, chetan2111, beanworks, phantomvish: Use a consistent name for the aggregator module throughout core

Issue #2416857 by cilefen, evgeny.chernyavskiy, lauriii, chr.fritsch, pjonckiere: Add an active_theme_path twig function