Steps to Repro:
1. Create a new Project
2. Install 2D SpriteShape (if not installed)
3. Project > Create > Sprite Shape Profile > Open Shape
4. Click 3 times Project > New SpriteShapeProfile > Inspector > Sprites > "+"
5. Assign sprites in the Sprites List (for example the default background)
6. Click on "-" button

Expected result: Item is be deleted
Actual result: Assigned Sprites deleted instead of item

Reproducible with: 2018.4.22f1 (1.0.14), 2019.3.12f1 (3.0.10), 2020.1.0b8 (4.0.2), 2020.2.0a9 (4.0.2)
Could not test with: 2017.4.40f1 (the package was not yet implemented)

Environment: Windows 10 and Mac 10.14