This addon adds an extended scroll node with smooth scroll settings.
How to use:
Activate the addon in the project settings' addon tab, Click the "+" button to add a new node and select "SmoothScrollContainer" instead "ScrollContainer". To add smooth scrollling to existing ScrollContainers, rightclick the node and select change type. Then select "SmoothScrollContainer".
Currently only supports one Control node as content-child!
Horizontal scroll will be implemented soon.
Mouse scroll icon by Greg Fiske from the Noun Project