Issue #2863188 by acbramley, Erik Frèrejean, Maouna, andypost, init90, larowlan, hchonov, sathish.redcrackle, vasi1186, chr.fritsch, tstoeckler, Krzysztof Domański, phjou, jibran, alexpott, catch, xjm: Hardcoded result size limit in the entity reference autocomplete widget

(cherry picked from commit 11089096)