Cannot add Conditions as successors

Problem/Motivation

It is not possible to add Conditions as successors to either an Event or an Action.

Conditions are not correctly or completely shown in the dropdown selector used to add successors. Rather there is a ‘empty’ slot for each Condition.

If you ‘select’ one of these ‘empty’ slots (on perhaps the basis that there is only the one condition, so you know that it has to be the empty slot), the form will not allow you to add it.

This worked as expected in alpha 2, so presumably a change to alpha 3 has introduced the issue.

Note that Actions are shown as expected in their selector, and can be added.

Steps to reproduce

1. Create a new model
2. Add an Event
3. Add one or more Conditions and Actions to the model
4. Navigate to the Event screen and attempt to add a Condition as a successor

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes