Issue #2798947 by Lendude, loopduplicate, rocketeerbkw, netdreamer, LoMo, Kristen Pol, rwam, Berdir, dawehner: Views pagers include ajax metadata

Issue #2389735 by lauriii, iMiksu, davidhernandez, larowlan, loopduplicate, LewisNyman, Wim Leers, dawehner, Cottser: Core and base theme CSS files in libraries override theme CSS files with the same name