Issue #2751325 by damiankloip, Grayside, dawehner, Wim Leers, catch, tedbow,...

Issue #2751325 by damiankloip, Grayside, dawehner, Wim Leers, catch, tedbow, alexpott, himanshu-dixit, Jo Fitzgerald, xjm, andrewbelcher, skyredwang, effulgentsia, hampercm, eelkeblok: All serialized values are strings, should be integers/booleans when appropriate

(cherry picked from commit 6cca8a6d)