Allow workflow editor window to scroll beyond bottom

[deanishe]

Currently, if a workflow extends beyond the bottom of the editor window in Alfred Preferences, it's only possible to scroll as far down as the bottom edge of the lowest element.

 

This makes it mildly tricky to add an element beneath that (i.e. start a new row). You have to create it somewhere in the middle of your existing elements, then drag it down into position.

 

It'd be helpful if Alfred allowed you to scroll down about a row's worth of pixels beyond the bottom of the lowest element, so you can create elements where you want them.

 

It's a fairly minor thing, but if it's easy to implement, I think it would improve the workflow-building experience a wee bit.