Allow document drag with middle mouse button
Please add the ability to pan the document by dragging the middle mouse button. In the same way that Ctrl-scroll wheel has become zoom in most applications, middle-click and drag has become the main way to move around a document.
I would like to see this implemented. The idea is that it would always work the same way clicking and dragging on an empty spot with the left-mouse button currently does. It wouldn't matter if the mouse was over a note or anything else. Nor would it matter if you were in notation mode.
Having it this way is extremely intuitive, since you never need to think about where the mouse actually is (assuming it is in the document at all). And, currently, the middle mouse button is complete unused, which seems to be a waste.
No matter how much I work with MuseScore, I keep trying to use this feature, just because it's so ubiquitous in other programs that have documents that need to be panned.