Issue #2259567 by jcnventura, eelkeblok, joegraduate, thejimbirch, nvahalik,...

Issue #2259567 by jcnventura, eelkeblok, joegraduate, thejimbirch, nvahalik, Lendude, andypost, anmolgoyal74, vacho, oriol_e9g, trackleft2, DamienMcKenna, smustgrave, nelp, LOBsTerr, twills, huzooka, Gauravvvv, xopoc, caesius, gyuhyon, mgifford, joelpittet, fietserwin, mark.labrecque, fabio84, lauriii, greggles, alexpott, mondrake, catch, quietone, drugan, jungle, DuaelFr: Support SVG files for theme logo setting

(cherry picked from commit 537f11dc)