Add option to limit scroll area of the navigator and the score view
In MuseScore 1.0 and in the trunk, one can drag the blue rectangle to very far area from the actual score. It would be better to limit the area where the blue rectangle can be dragged.
In the same line, by dragging the score itself, it's possible to go quite far. I should be limited.
This feature request is not critical of course, but it's one of the small details that make MuseScore looks better and be more user friendly.