DXDP-706: Form.FormGroup will render empty boxes when null are passed as children

[loginist]

Actual behavior

<Form.FormGroup>
  <Form> ... </Form> // => going to render a wrapped form
  {null} // => going to render an empty <Well> component
</Form.FormGroup>

Expected behavior

<Form.FormGroup>
  <Form> ... </Form> // => going to render a wrapped form
  {null} // => renders nothing
</Form.FormGroup>

Temporal solution in client side

const CFormGroup = styled(FormGroup)`
	${FormGroup.FormWrapper}:empty {
	  display:none;
	}
`

[vjsolanki]

i would like to work on this.

[loginist]

Hey @solankivj94! Thank you for your interest in Cosmos. This task was actually addressed in #1678.