In Skinning Editor when bones are added in the Bone Influence window, the topictopic of the bone overlaps with the "Bone Influence" title, refer attached video and .PSB file

Steps to Reproduce:
1. Create a New Project with 2D Template
2. Import .PSB file in the project.
3. Window > 2D > Sprite editor.
4. project > Fei_Cel_group.PSB .
5. Sprite editor > Skinning Editor > Create bone(Create 3 bone)
6. Bone Influence > Sprite select > Add selected bone(+)

Actual Result:
The text of selected bone overlaps with Bone Influence text

Expected Result:
Selected bone is added gracefully

Reproducible on:
2020.2.0a10, 2020.2.0a5

Working fine on:
2020.2.0a4,2020.1.0b8

Package Found version: 4.2.2

Package working fine version: 4.2.1

Environment:
Windows 10 and macOS 10.14