Project feature: When setting/removing expiration, redundant item events are added and lose focus on project item

Description

Steps to reproduce:
1. Item1_Published is a published content version that is not attached to a project.
2. Drag and drop Item1_Published to an active project (Project1) -> This adds a new draft version, Item1_Draft, to Project1.
3. User1 selects Item1_Draft and views its comment pane in the Project Overview of Project1.
4. User2 edits Item1_Draft to set an expiration date/time.
5. User2 edits Item1_Draft to remove an expiration date/time.

Expected: No new item events are added to Item1_Draft.

Actual:
Issue #1: User loses focus on Item1_Draft.
Issue #2: User1 sees new redundant item events (Removed then Added) on Item1_Draft. When User1 reloads comment pane of Item1_Draft, only the last Added event is shown.