As a store admin, I want to be prevented from adding an item to a list when it is already on the list

• Type: Story
• Status: Open
• Priority: Trivial
• Resolution: Unresolved
• Affects Version/s: 2.1.3
• Fix Version/s: None
• Component/s: Digital Merchandise Management, Digital Store Management
• Labels: None
• Severity of Issue: Minor
• Business Value (single choice): 1

Assumptions

1. Pricing engine V2.0
2. At least one product

Steps to Reproduce

1. Go to Control Panel → Commerce → Pricing → Promotions, or
   Go to Control Panel → Commerce → Pricing → Price Lists, or
   any place the item finder component is used.
2. Create a price list or promotion
3. Add a product to the price list using the item finder
4. Search for the same product

Expected Behavior

The product which is already added to the price list or promotion cannot be selected (button is disabled)

Actual Behavior

The product which is already added to the price list or promotion can be selected

Reproduced On

7.1

Tomcat 9.0.33 + HSQL 2.3.3
marco-leo/liferay-portal-ee:7.1.x git hash f6228ce4798853c4074a36021934c732012b438f