9f475d5427
There is a DisplaySuspender in MidiRegionView::init(), and another invoked during the addition of a RegionView to a StreamView. Before this change, both suspenders were created to invoke a full "model-changed" redisplay. Since every RegionView must be added to a StreamView to be visible, we only need the second suspender to invoke the model-change. The first one can be just a view change (and probably isn't necessary at all, but I did not want to change that much at this point in time).
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