"Quality" property under "Vorbis" Compression Format In Audio Import Settings does not validate certain inputs. following are the values
5,10,15,20,23,27,30,40,46,49,54,60,67,73,80,86,92,99

Steps to repro:
1. Create a new project
2. Import any Audio file
3. Audio file > Inspector > Import Settings > Compression Format
4. Vorbis > Quality
5. Set Input value 5 or 10.

Actual Result:
Text field does not validate certain inputs like: 5,10,15,20,23,27,30,40,46,49,54,60,67,73,80,86,92,99

Expected Result:
Text field should validate all inputs

Reproducible on:
2020.1.0a5, 2019.2.4f, 2018.3.14f1

Environment:
Linux (ubuntu 16.04 LTS), Window10, macOS 10.14