Make contact form handle agnostic.

[Numkil]

Open up default permission for formie name/handle for content manager and make sure the contact page does not hardcode form onto it.

[janhenckens]

@Numkil @SarahOorts @HannahDeWachter I'm adding a field to the contact single where we can select the Formie form - how do we feel about making that field required?

[SarahOorts]

@janhenckens I think making it required as default is ok. If needed we can change it based on the needs of a project.

[Numkil]

Agreed default should be required.

[janhenckens]

Check, per is ready here #502