This is the first step before this userright can be granted to everyone
(or at least 'user').
There were a few issues with granting this permission at all on public
wikis (tracked at T85847) which are now all fixed.
Bug: T85847
Change-Id: Idcaaaaa5cc3fd7c3efca6c57698767689b9a1d09
$wgGroupPermissions['sysop']['editinterface'] = true;
$wgGroupPermissions['sysop']['editusercss'] = true;
$wgGroupPermissions['sysop']['edituserjs'] = true;
+$wgGroupPermissions['sysop']['editcontentmodel'] = true;
$wgGroupPermissions['sysop']['import'] = true;
$wgGroupPermissions['sysop']['importupload'] = true;
$wgGroupPermissions['sysop']['move'] = true;