*Steps to reproduce:*
# Create and open an empty project and install com.unity.behavior
# Create a behavior graph (Assets > Create > Behavior > Behavior Graph)
# Open the graph and notice that it is displaying text "Press Space or Right Click to add your first action."
# Add some nodes and move all of them somewhere far away (see attached video)
# Close the graph and reopen it

*Actual results:* The nodes are not centered

*Expected results:* The nodes are centered

*Reproducible with versions:* 1.0.8

*Tested on (OS):* MacOS

*Notes:*
* I suspect this is because the text "Press Space or Right Click to add your first action." is being taken as a node when centering