Option to Temporarily Disable "Middle Click + Move" Scrolling with Modifier Key

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There was a thread on this a while ago:

Improvements to Autoscrolling (Middle click and drag to scroll)

TLDR: Add options to: -Be able to turn off autoscrolling on a per-window and per-application basis. -Add global shortcut to toggle autoscrolling on and off, or use the status of Scroll Lock to do so. -Make it possible to rebind autoscrolling from middle click to something else. The Autoscrolling feature (aka press middle mouse and move to scroll) is simply amazing. It has the potential to revolutionize how we scroll anything on our computers, it feels THAT good to use. Especially for mice …

The request is tracked here: https://bugs.kde.org/show_bug.cgi?id=504011