Shift+Space in Behavior doesn't maximize the window when docked.

Steps to reproduce:

1. Open a project with Behavior package (add it if needed, com.unity.behavior)

2. Open a Behavior Graph by double clicking on it (You need a Behavior Graph. either import the sample, or right click inside the project window -> Create -> Behavior - > Behavior Graph

3. Dock the window.

4. Use Shift+Space shortcut.

Actual results: 

The add node pop-up shows up.

Expected results: 

The window should maximize to full size.

Reproducible with versions: 

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): 

Notes:

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