Convert all remaining files to typescript.

modules/shared/barItemBox.ts

@@ -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.Button({
+    class_name: `bar_item_box_visible ${Object.hasOwnProperty.call(child, "boxClass") ? child.boxClass : ""}`,
+    child: child.component,
+    visible: computeVisible(),
+    ...child.props,
+  });
+};