On the opening "New Environment Library" in "Look Dev" window from the Inspector then it is not set by default in the "Library" input field and the input field is always set as "None" but the empty environment can be added under Environment Library in the Look Dev window, refer attached video

Steps to repro:
1. Create a new project with HDRP Template
2. Project window > Create > Look Dev > Environment Library
3. Project > New EnvironmentLibrary > Inspector > Open in Look Dev window

Actual Result:
Selected "New Environment Library" is not set by default in Library input field when Look Dev window is opened from Inspector

Expected Result:
Selected "New Environment Library" should be set as default input field of Library in the Look Dev window

Reproducible in:
2020.2.0a18, 2020.1.0b16, 2019.4.3f1, 2019.3.15f1 with Package Version 9.0.0-preview.33, 8.2.0, 8.1.0, 8.0.1, 7.4.1, 7.3.1.

Environment:
Occurring on Windows 10 & macOS 10.15