How to reproduce:
1. Create a new Project
2. In the Hierarchy window Create two Cube game objects
3. Drag one Cube game object into the other to parent it
4. In the Inspector window change the Layer of the parent Cube object

Expected result: The Text fits into the buttons and is displayed in Its entirety
Actual result: The Text overflows and is not displayed properly

Reproduced with: 2018.2.0b1, 2018.2.0a6
Not reproducible with: 2018.2.0a5, 2018.1.0f1, 2017.4.1f1, 2017.2.2p3, 2017.1.3p3

Note: Only reproduces if the display scaling is set to 175% and above, tested on the 3840x2160 and 2560x1440 resolutions.