Scroll Up in Workflow Pane for Extra Room to add tools

[kgordish]

I would like the ability to scroll up in the workflow pane. 

You can scroll down or to the side indefinitely. 

Ran into situation where I had a complex workflow and had to add more pathway near the top of a workflow. 

I was running out of room near the top. My solution was to drag tools far to the right instead.