The title bar of property window in a shader graph hides or clips when it's expanded beyond the length of the window and dragged vertically. Additionally, artifacts appear on moving the window horizontally when the header is hidden

Steps to Repro:
1. Open attached project
2. Open PropertyTest Shader Graph from Project window
3. Maximize Shader Graph
4. Expand the property window beyond the screen length
5. Click on its header and drag it vertically

Actual Result:
1. Header disappears behind the window header
2. Additionally, artifacts appear on moving the window horizontally when the header is hidden

Note: Artifact bug is not occurring in 2019.2.0b8

Expected Result:
User shouldn't be able to expand property graph beyond the window length or Header should not move after the window is expanded

Occurring with Unity:
2019.3.0a8, 2019.2.0b8, 2019.1.4f1, 2018.3.11f1

Occurring with Package:
6.5.2, 4.10.0

Environment Used:
Windows 10 and Mac 10.14