Add missing page state when containing redirect

package.json

@@ -1,6 +1,6 @@
 {
     "name": "interlanguage-checker",
-    "version": "1.11.6",
+    "version": "1.11.7",
     "description": "Check the consistency of MediaWiki interlanguage links in a simple overview.",
     "author": "Felix W. Dekker",
     "browser": "dist/bundle.js",

src/main/js/DOM.js

@@ -354,6 +354,10 @@ export class InterlangTable {
                             return this._createIcon("rotate-left", "Links to its own wiki 😕", ["warning"]);
                         case "unlinked":
                             return this._createIcon("chain-broken", "Misses one or more links 😕", ["error"]);
+                        case "redirected":
+                            return this._createIcon("mail-forward", "Links to a redirect 😕", ["warning"]);
+                        default:
+                            throw new Error(`Invalid page state '${state}'`);
                     }
                 })
                 .map(it => `${it}<span> </span>`);