Confirmation dialog: fix confirmation dialog titles.

src/widgets/ConfirmationDialog.tsx

@@ -1,6 +1,7 @@
 import * as React from 'react';
 
 import Dialog from '@material-ui/core/Dialog';
+import DialogTitle from '@material-ui/core/DialogTitle';
 import DialogContent from '@material-ui/core/DialogContent';
 import DialogActions from '@material-ui/core/DialogActions';
 import Button from '@material-ui/core/Button';
@@ -9,6 +10,7 @@ import { pure } from 'recompose';
 
 export default pure((_props: any) => {
   const {
+    title,
     children,
     onCancel,
     onOk,
@@ -21,6 +23,9 @@ export default pure((_props: any) => {
       onClose={onCancel}
       {...props}
     >
+      <DialogTitle>
+        {title}
+      </DialogTitle>
       <DialogContent>
         {children}
       </DialogContent>