If an asset download is in progress under "My assets" in Package manager and some other option in packages dropdown is selected, the download update progress is paused. Refer the attached video

Steps to reproduce:
1) Create a new project
2) Window > Package Manager > My Assets
3) Download any asset
4) Switch Packages dropdown to "In Project"

Actual result: Download progress of the asset is paused

Expected result: Either the download progress should not be shown in other dropdowns are selected or the download progress should be updated

Occurring on: 2020.2.0a3, 2020.1.0b2, 2020.1.0a1

Working fine in: 2019.3.4f1

Environment: Both Windows and Mac