Issue #2901412 by claudiu.cristea, pfrenssen, grathbone, ravi.shankar, saidatom, Lendude, quietone: Add current route parameters to the confirmation form route

Issue #3134554 by Matroskeen, larowlan, paulocs, aluzzardi, phenaproxima, mark_fullmer, vierlex, hchonov, grathbone: Media fields with Media Library form widget trigger PHP 'Notice: Undefined index'

Issue #2879918 by _Archy_, amateescu, Sam152, grathbone: Send entity to selection handler on validate