Steps to repro:
1. Create a new project with 2D Template
2. Project > Create > 2D > Sprite Atlas > Inspector > Show Platform setting for > Main Texture dropdown > New secondary Texture settings
3. Observe the " Show Platform setting for" button is overlapping with the "Secondary texture name" button.

Actual Result:
In Sprite atlas, the " Show Platform setting for" button is overlapping with the "Secondary texture name" button.

Expected Result:
" Show Platform setting for" button should not overlap with the "Secondary texture name" button and it should be well separated from each other.

Occurring in:
2020.2.0a15, 2020.2.0a5

Note: In Sprite atlas, the " Show Platform setting for" button is introduced in 2020.2.a5.

Environment:
Windows10 and macOS 10.14