Turn generating wrappers for the virtuals for wxGLCanvas back on.
Fixes #16388

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@77730 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Set the number of simultaneous builds on Windows back to 1

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@77731 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Bump demo version too

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@77732 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix typo in comment

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@77733 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775