Issue #2927338 by berdir, anmolgoyal74, swatichouhan012, smustgrave, alexpott,...
Issue #2927338 by berdir, anmolgoyal74, swatichouhan012, smustgrave, alexpott, gábor hojtsy: Ensure config entity langcode property does not change when installing, adding or editing a language
(cherry picked from commit 9e7842eb)