Issue #2227363 by sun: System.theme.disabled config schema defines wrong data type.
Issue #2070323 by tompagabor, LewisNyman, miro_dietiker, Bojhan: Apply seven style guide to dblog.
Revert "Issue #2113911 by LewisNyman, longwave, nod_, rteijeiro: Modal style update."

Broke Bartik, still needs discussion.

This reverts commit 5a8a34e828f71859683e15df24bb8d505b2a7268.