Revert "Issue #3172166 by Pooja Ganjage, ekes, Megha_kundar, tstoeckler,...
Revert "Issue #3172166 by Pooja Ganjage, ekes, Megha_kundar, tstoeckler, mbovan, Spokje, alexpott: Element::properties() produces notices if given an array with integer keys"
This reverts commit 60a42060.