pipit_form_response() with submission to multiple Perch apps

[husseinalhammad]

Issue reported on Perchology Slack: https://perchology.slack.com/archives/CCHDW25UK/p1613567530079000?thread_ts=1613426730.062000&cid=CCHDW25UK

I have created a reduced test case and can confirm pipit_form_response() allows form submissions to multiple apps:

pipit_form_response('sbtn_assessment',[
    'template' => 'forms/my_form.html',
    'app' => 'perch_forms perch_mailchimp', 
    'dispatch' => true,
]);