Creating a new relationship type while editing case type definition adds a blank row in the roles section
Came across this while working on #774. Making it a separate child issue (or trying to) since the cause is different and can reproduce separately on the public demo. The cause is that crmCaseType.js accesses data.relationshipType.label_b_a as if it was an object member but it actually looks like data.relationshipType.19.label_b_a, where 19 is the newly created id.
By "new relationship type" I mean on the case type edit admin screen where you have the dropdown to add a role, if you start typing in the dropdown and it doesn't match an existing relationship type it gives you a "(new)" hint where you can click to create the new relationship type on the fly.