When the "Search by Label" button is selected from the Project window, a list of several labels open ups where "Audio" Label is missing due to which Audio files from the assets are not viewed. refer attached screenshot.

Steps to Reproduce:
1. Create a New Project
2. Project Window > Search by Label.

Actual result:
Audio label is missing from the Search by Label list.

Expected result:
Audio label is included in Search by label list.

Occurring on:
2020.1.0a25, 2020.1.0a19

Working Fine on:
2020.1.0a18, 2019.3.3f1.

Environment:
Windows 10 and macOS 10.14, 10.15