The text in color model dropdown is not completely visible when selected and overlapping with dropdown arrow

Steps to Reproduce:
1. Create a new project
2. Select Directional Light from Hierarchy
3. Inspector > Light > Color
4. Color Picker > Color Model dropdown > Select RGB 0-255 or RGB 0-1.0

Actual Result:
Color model text is clipping and overlapping with dropdown arrow.

Expected Result:
Text is clearly visible without any overlaps.

Note:
Refer attached Actual and Expected Screenshots

Reproducible on:
2019.3.0a4, 2019.3.0a3

Works On:
2019.3.0a2, 2019.2.0b5

Environment:
Both Windows and MacOS