Issue #2743931 by aaronbauman, gambry, harsha012, joachim, acbramley,...

Issue #2743931 by aaronbauman, gambry, harsha012, joachim, acbramley, rackberg, koryp, DedMoroz, akalam, Yogesh Pawar, alexpott, alexej_d, larowlan, stefan.r, unstatu, sathish.redcrackle: Saving to the private tempstore doesn't start a session for anonymous users