How to do smooth OpenGL in a Plugin?

[fr810]

Please try this again on the latest develop. See this forum thread for details:

Message queue problem with repaint throttling

Just for reference - this is why we put in that commit in the first place: I need to make sure that your fix does not break this again. The problem is, I think this only happened on El Capitan. I can’t reproduce it on Sierra even when i completely remove the async updater thing (and redraw directly).