When using Package Manager UI version 2.0.1 with Unity core 2019.1, the layout of the detail view will be broken.

The content inside the Package Manager detail view is vertically justified, which creates large spaces between the content when the window is scaled up vertically. The content also doesn't wrap correctly at the edge of the window.

This is probably caused by changes to UI Elements between 2018.3 and 2019.1, as using 2.0.1 in 2018.3 does not cause any issues.

1. Install Unity 2019.1
2. Create a new project with any settings
3. Import Package Manager UI version 2.0.1
4. Maximise the Package Manager UI window
5. Choose any package from the list view
6. Look at the content in the detail view

Expected Result:
Content is layed out in a sensible and readable format.

Actual Result:
Content is vertically justified, spreading the content out vertically through the window. Content doesn't wrap correctly at the window edge.