feat: hot reload support for some widgets, css improvements on marketplace

Co-authored-by: Alex Sparkes <turbomarshmello@gmail.com>

src/modules/helpers/eventbus.js

@@ -0,0 +1,17 @@
+const EventBus = {
+  on(event, callback) {
+    document.addEventListener(event, (e) => callback(e.detail));
+  },
+
+  dispatch(event, data) {
+    document.dispatchEvent(new CustomEvent(event, {
+      detail: data
+    }));
+  },
+
+  remove(event, callback) {
+    document.removeEventListener(event, callback);
+  },
+};
+
+export default EventBus;