Fix Win32 build w/ Qt, fix mouse buttons & wheel with WGL
Fix Win32 build
Merge pull request #381 from tribal-tec/master

Fix Win32 build w/ Qt, fix mouse buttons & wheel with WGL
Make DisplayCluster a View attribute that can be set by a global/env var.
Merge pull request #382 from rdumusc/displaycluster

Make DisplayCluster a View attribute that can be set by a global/env var.