Choice Set Present followed directly by a Delete can have undefined behavior

[RHenigan]

Bug Report

In certain cases, a present can happen when the choices are not available on the head unit. The present operation should double-check when it starts that all cells are preloaded on the head unit. When a present operation should be created along with the preload, and updated when the preload finishes. That way the delete will be slotted after the present.

Reproduction Steps

1. Send a present with a large number of choices
2. Immediately send a delete for several of those choices

Expected Behavior

The delete happens after the present

Observed Behavior

Undefined error behavior