How to reproduce:
1. Open the user's attached project
2. In the Project window select the 'Test' Asset
3. Try to select the 'Everything' option for each field in the Inspector
4. Observe the Inspector

Expected result: All of the fields get set to 'Everything'
Actual result: Only the last two fields get set to 'Everything'

Reproducible with: 2019.4.27f1, 2020.2.7f1, 2020.3.9f1, 2021.1.8f1, 2021.2.0a17
Cannot test with: 2018.4.35f1 (there is no 'Everything' option in the dropdowns)

Notes:
- In the 2019.4 stream Byte, Ushort and Uint get set to 'None' after selecting the 'Everything' option
- In the 2020.2 and 2020.3 streams Byte and Ushort get set to 'None' after selecting the 'Everything' option
- In 2021.1.0a5 and above the issue reproes as described in the description above
- When trying to set the maximum value (by pressing the 'Set to MaxValue') in 2021.1.0a5 and above the fields get set to the 'Mixed' value
- When trying to do the same in 2021.1.0a4 only the Byte and Ushort fields get set to 'Mixed' (other fields get set to 'Everything')