Add warning message when window.localStorage is disabled

ui/home_historyctl.js

@@ -1,11 +1,17 @@
 import { History } from "./commands/history.js";
 
 export function build(ctx) {
-  let rec = JSON.parse(localStorage.getItem("knowns"));
+  let rec = [];
+
+  try {
+    rec = JSON.parse(localStorage.getItem("knowns"));
 
     if (!rec) {
       rec = [];
     }
+  } catch (e) {
+    alert("Unable to load data of Known remotes: " + e);
+  }
 
   return new History(
     rec,