fix: prevent settings screen width from exceeding viewport on mobile (#1200)

Author: Robot-Inventor

src/css/browserAction.css

@@ -22,6 +22,10 @@ body {
     font-size: 1rem;
 }
 
+body.mobile {
+    max-width: 100vw;
+}
+
 #logo {
     height: 1.75rem;
     vertical-align: sub;

src/ts/browserAction/browserAction.ts

@@ -1,5 +1,10 @@
 import { loadSettings } from "./loadSettings";
 import { loadVersion } from "./loadVersion";
 
+const isMobile = Boolean(/iPhone|Android.+Mobile/u.exec(navigator.userAgent));
+if (isMobile) {
+    document.body.classList.add("mobile");
+}
+
 void loadSettings();
 loadVersion();