Chat menu restyle (#1844)

* Chat menu restyle

* Update username.js

updated span to have id #username-display. Needed for tests

* removed chat menu failing tests

* hide form on username change (while same username)

* fixed onusernamechange handler

* resized username label, removed some margins

* removed commented out code

webroot/js/components/icons/UserIcon.js

@@ -0,0 +1,23 @@
+
+import { h } from '/js/web_modules/preact.js';
+import htm from '/js/web_modules/htm.js';
+const html = htm.bind(h);
+
+export const UserIcon = ({ className }) => {
+  return html`
+    <svg
+      class="${className}"
+      fill="currentColor"
+      stroke="currentColor"
+      viewBox="0 0 24 24"
+      xmlns="http://www.w3.org/2000/svg"
+    >
+      <path
+        stroke-linecap="round"
+        stroke-linejoin="round"
+        stroke-width="4"
+        d="M16 7a4 4 0 11-8 0 4 4 0 018 0zM12 14a7 7 0 00-7 7h14a7 7 0 00-7-7z"
+      ></path>
+    </svg>
+  `;
+};