How to reproduce:
1. Open the attached project "PackageManagerIconGlitch.zip"
2. Open the Package Manager Window
3. Enter "l" or some other letter into the Package Manager Window's search field
4. Observe the top left corner of the Package Manager Window

Expected result: no icon is drawn on top of the first search result
Actual result: one or more icons from the Package Manager UI window are drawn on top of the first package entry in the list

Reproducible with: 2019.2.0a9 (package version 2.2.0)
Not reproducible with: 2018.3.10f1 (package version 2.0.7), 2019.1.0b8 (package version 2.1.1), 2019.2.0a7 (package version 2.1.2)

Could not test with 2017.4.23f1 (no Package Manager Window)