Dorico 5: Bug drawing MIDI cc curve in key editor

[dspreadbury]

The problem, I think, is that Dorico is losing the mouse release, so you end up continuously editing the same region. This is the same problem discussed e.g. here:

Trouble with Apple Magic Trackpad

Hi, congratulations for the latest version of Dorico but I have problems working in Dorico 5 with the Apple Magic Trackpad (latest generation), especially if the “tap to click” option is enabled. Often I have to click several times instead of a single click and especially in the key editor the single click behaves as if I were always holding down. With the Magic Mouse, on the other hand, I haven’t encountered any problems. In Dorico 4 the Magic Trackpad works fine.