Add a configrmation dialog widget.

src/widgets/ConfirmationDialog.tsx

@@ -0,0 +1,42 @@
+import * as React from 'react';
+
+import Dialog from 'material-ui/Dialog';
+import FlatButton from 'material-ui/FlatButton';
+
+import { pure } from 'recompose';
+
+export default pure((_props: any) => {
+  const {
+    onCancel,
+    onOk,
+    ...props,
+  } = _props;
+  const actions = [
+    (
+      <FlatButton
+        key="1"
+        label="Cancel"
+        primary={true}
+        onClick={onCancel}
+      />
+    )
+    ,
+    (
+      <FlatButton
+        key="2"
+        label="Submit"
+        primary={true}
+        onClick={onOk}
+      />
+    ),
+  ];
+
+  return (
+    <Dialog
+      actions={actions}
+      modal={false}
+      onRequestClose={onCancel}
+      {...props}
+    />
+  );
+});