The 3 buttons in the 4 views have a strange behavior. Only on OS X of course. There's no problem when the application boots. All buttons are visible when and where they should be.
When one of the views is set to fullscreen, so by:
- The normal m_FullScreenButton button on all views
- "Big 3D", "Axial plane", "Sagittal plane" or "Coronal plane" actions in m_SettingsButton.
we can't see the button anymore. Or they flicker. Or they are always visible. Or a random happy mix.
There seems to be some safe hover zones where the buttons appear.
They appear when I click and drag the mouse the the buttons, so I can release the click and use the buttons.
OS X only. It works perfectly on Windows and Linux.
I tested on OS X 10.11.6 (El Capitan) on an Mac Mini and a Mac Book Pro.