UIBlock Tool (scene gizmo): scale from center out

[Querke]

(used free trial version of nova, which I received from Adam. I think this version is based on version 1.0)

Hello!

As I was adjusting and scaling UIBlocks in the scene view with the Nova gizmos, I was constantly finding myself missing one feature, and that is: Hold alt to scale from center out
This is a feature that is in most visual programs, Unity has it in their default UI (create a Unity UI image, scale it in the scene view while holding alt).