Package Manager UI - Unable to switch between "In Project" and "All Packages"
When the package manager UI is docked. Maximizing and minimizing the menu stops the drop down menu for "All" and "In Project" working.

Steps to reproduce
- Open any project.
- Open Package Manager menu.
- Dock it in the menu system.
- In the top right of the Package Manager window use the drop down menu to maximize\minimize the menu.
- Try to change from "In Package" to "All Packages" (Or vise-versa)
Notice issue >> Menu no longer works.

Tested in
Unity 2018.3.0a6
Package Manager UI 2.0.8

Working in Package Manager UI 2.0.0