Qt stdout runtime warnings: Attempt to set a screen on a child window.

[andyferris]

I'm getting a lot of stdout chatter of the form:

0x1d4d670 void QWindowPrivate::setTopLevelScreen(QScreen*, bool) ( QScreen(0x197b460) ): Attempt to set a screen on a child window.
0x1d6ee10 void QWindowPrivate::setTopLevelScreen(QScreen*, bool) ( QScreen(0x197b460) ): Attempt to set a screen on a child window.

There is a lot of related info at:

http://stackoverflow.com/questions/33545006/qt5-attempt-to-set-a-screen-on-a-child-window-many-runtime-warning-messages

[c42f]

According to the stack overflow post, we'd need to move 100% to Qt5 and use QOpenGLWidget to fix this.

It's well past time for a displaz 0.4 release, maybe that should be the last version supporting Qt4, and then we move forward with Qt5.