Make it possible to scroll down the chain while dropping an operation

It is currently possible to drop an operation only in the visible part of the window.
We would like the window to scroll down automatically when dragging an operation at the bottom of the visible part of the window, so as to be able to drop it exactly where one wants.
On the contrary, we should be able to scroll up when dragging at the top of the visible part of the chain.

If this was not possible for some reasons, then we would have to study the opportunity to have a floating and always displayed operations catalog panel.

Problem can be observed here https://connect.nuxeo.com/nuxeo/site/studio/ide?project=cm-showcase-nux#@feature:IC-AC-wf-investingator-generateContent-output.ops