I've this form:

```
f[a_, b_] := a + b;
form = FormFunction[FormObject[<|"a" -> "Number", "b" -> "Number"|>], f[#a, #b] &];
form[]

```

How I can automatically bring up the form after the output display? (If I insert 3 and 2 and I click submit, it return 5. After 5, I'd like to see the form again.)
And can I remove "Cancel" or assign it an action like "Submit" button?
Thanks