Issue #2994696 by oknate, Wim Leers, phenaproxima, starshaped, lauriii,...

Issue #2994696 by oknate, Wim Leers, phenaproxima, starshaped, lauriii, andrewmacpherson, ckrina, a.milkovsky, John Pitcairn, artis, cs_shadow, duncan.moo, Berdir, JamesK, Ambidex, BartK, idflood, Dave Reid, CTaPByK, Reinmar, kmoll, webflo, thenchev, wrd, yched, kkrzton, slashrsm, root_brute, Ruuds, MobliMic, ls206, marcoscano, pixelmord, narnua: Render embedded media items in CKEditor