Add server manager

Only removing is supported for now

js/trweb.js

@@ -44,6 +44,8 @@ class trweb {
         this.#dom_servermanager.addEventListener('torrentserver-added', this.#dom_torrentmanagger);
         this.#dom_servermanager.addEventListener('torrent-created', this.#dom_torrentmanagger);
 
+        this.#dom_menubar.addMenuNode('servermanager', this.#dom_servermanager.menuentry);
+
         this.#guiFooter = document.createElement('div');
         this.#guiFooter.classList.add('trweb_footer');