fix osx catalina

[allefant]

No description provided.

[allefant]

Unfortunately could not find any documentation on what the update() call is supposed to do exactly, but the skater demo works again with this on OSX Catalina, including window resizing.

[elias-pschernig]

Oh, and I forgot to mention, this also places the activateIgnoringOtherApps call on the main thread - which turned out to be just a harmless warning, but is still the right thing to do.

Anyway, issue #1091 seems to be fixed with this, unless we discover the original purpose of the update() call.

[elias-pschernig]

Well, after figuring out the difference in objective C between @selector(update) and @selector(update:) it now does call update again, from the main thread. Should be 100% identical to before now, just works in Catalina.

[djn658]

Thank you very much! It works now. However, the display window cannot be selected. Do you happen to know how to fix it? @allefant

[mbkorecki]

Thanks a lot. It works for me as well.

[SiegeLord]

Thanks for all the testing everyone, and Elias for writing this!