Fix bad backend URL on generated Qr Code for tokens authentication

moneymgr_web/src/api/ApiClient.ts

@@ -31,12 +31,21 @@ export class APIClient {
     return URL;
   }
 
+  /**
+   * Get the full URL at which the backend can be contacted
+   */
+  static ActualBackendURL(): string {
+    const backendURL = this.backendURL();
+    if (backendURL.startsWith("/")) return `${location.origin}${backendURL}`;
+    else return backendURL;
+  }
+
   /**
    * Check out whether the backend is accessed through
    * HTTPS or not
    */
   static IsBackendSecure(): boolean {
-    return this.backendURL().startsWith("https");
+    return this.ActualBackendURL().startsWith("https");
   }
 
   /**

moneymgr_web/src/routes/TokensRoute.tsx

@@ -268,7 +268,7 @@ function CreatedToken(p: { token: TokenWithSecret }): React.ReactElement {
           <div style={{ padding: "15px", backgroundColor: "white" }}>
             <QRCodeCanvas
               value={`moneymgr://api=${encodeURIComponent(
-                APIClient.backendURL()
+                APIClient.ActualBackendURL()
               )}&id=${p.token.id}&secret=${p.token.token}`}
             />
           </div>