This fixes the base button in the favorites modal by replacing the legacy
`Input` component with StatusQ's `StatusInput` and `StatusButton` components.
It also updates the validation mechanism to use the one provided by StatusQ.
The `height` of the modal has been adjusted due to its content growing when
validation errors are shown.
This will go away as soon as we replace `ModalPopup` with `StatusModal`.
Fixes#3977