Rendering statistics view (#3322)

Co-authored-by: Bart Louwers <bart@emeel.net>

scripts/style-spec.mjs

@@ -190,4 +190,12 @@ modifiedReferenceSpec["paint_location-indicator"] = {
   }
 };
 
+// internal use
+modifiedReferenceSpec["layout_symbol"]["symbol-screen-space"] = {
+    "type": "boolean",
+    "default": false,
+    "property-type": "data-constant",
+    "doc": "Internal use only"
+};
+
 export default modifiedReferenceSpec;