Add default domain to membershiptype API

[mattwire]

Overview

As identified in #14888

Before

No default domain for MembershipType API

After

Default domain for MembershipType API

Technical Details

Comments

[civibot]

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[eileenmcnaughton]

@seamuslee001 @nganivet this is 'correct' but it's quite late in the piece to add it to apiv3 - do you think anything will break?

[seamuslee001]

@eileenmcnaughton i think it sounds right, the only thing i can think of maybe in regards to AUG and the membership_type_id field on an advanced search

[eileenmcnaughton]

I should note that it is only a default - I think you can override to empty if you want

[seamuslee001]

Yeh and i have sought to do that via the multisite extension which feels more correct to me. I think its only on search forms where we want to be able to select multiple memberships. https://github.com/eileenmcnaughton/org.civicrm.multisite/pull/22/files