Enhancements: Allow scroll secondary menus

[papampi]

When there are too many values in secondary value screen some top and bottom values are not visible, anyway to make them visible by scroll or other ways?
Now when I try to get the mouse to that section it goes hidden.

[ljuzig]

I can't make it scrollable cuz currently it doesn't interact with the mouse. And I don't think I want to change this behaviour because it would add too much complexity to the menus. I think I will try to detect whether the size is too big and if so, separate the data into several columns.

[ljuzig]

@papampi Try this build:
[email protected]

Now the list should be split when it's too long:

[papampi]

This is much better than my suggestion to scroll.
Thank you.