Squashed 'nk_pugl/' changes from 5a18318..224e389
Squashed 'nk_pugl/' changes from 5a18318..224e389

224e389 use unique window class id on win/osx.

git-subtree-dir: nk_pugl
git-subtree-split: 224e3894ce8779ebc92371673ff1cc592087dac5

OpenMusicKontrollers/sherlock.lv2,OpenMusicKontrollers/sherlock.lv2,OpenMusicKontrollers/sherlock.lv2,OpenMusicKontrollers/sherlock.lv2