Added workspaces, window titles, volume, bluetooth, systray and date/time modules to the panel

modules/shared/barItemBox.js

@@ -0,0 +1,15 @@
+export const BarItemBox = (child) => {
+  const computeVisible = () => {
+    if (Object.hasOwnProperty.call(child, "isVis")) {
+      return child.isVis.bind("value");
+    }
+
+    return child.isVisible;
+  }
+
+  return Widget.Box({
+    class_name: "bar_item_box_visible",
+    child: child.component,
+    visible: computeVisible()
+  });
+};