An icon is displayed in property field when the property is missing a value

Reproduction steps:
1. Open the attached project.
2. Select Assets/MultiMaterial/Materials/Obsidian/Obsidian_Template asset
3. Inspect the Inspector window

Reproducible with: 2022.2.0a9, 2022.2.0b9, 2023.1.0a12
Not reproducible with: 2020.3.40f1, 2021.3.11f1, 2022.1.19f1, 2022.2.0a8

Reproducible on: macOS 12.6

---

UX Proposal:

Don't show icon when object picker is empty:

When an object picker is empty, the label reads: None (Type-of-object, eg Texture 2D / Material)

• Because type of object is stated in the label, there is no need for the type icon to be shown when obj picker is empty,
• Showing an icon when obj picker is empty creates confusion as reported by users, perceived as there is a texture there named missing

 

"Empty" text styling

• A while back design team proposed a text-style for "empty menu / none available / place holder" texts. We recommend this style used for None / Missing when obj picker is empty.
• This text style is intended for n/a or empty controls. It uses 70% alpha. (as opposed to 40% in disabled style).