Adjust floating override

Follow up to I3234e7712b8c111b070c35e38425c865ff7213f9
Do not disable the feature entirely as it has other purposes.

Bug: T280260
Change-Id: I47d16eb8186efa83e158713d852b443bce9aee1c

resources/skins.vector.styles.legacy/layouts/screen.less

@@ -69,6 +69,12 @@ body {
 	.mixin-clearfix();
 }
 
+// FIXME: Temporarily disable the core rule which applies to the wrong element.
+// The definition in core still needs work (see T279008).
+.mw-parser-output:after {
+	content: none;
+}
+
 /* Head */
 #mw-page-base {
 	.vertical-gradient( @background-color-base, @background-color-secondary, 50%, 100% );

skin.json

@@ -99,7 +99,7 @@
 		"skins.vector.styles.legacy": {
 			"class": "ResourceLoaderSkinModule",
 			"features": {
-				"content-parser-output": false,
+				"content-parser-output": true,
 				"normalize": true,
 				"elements": true,
 				"content": true,