GraphicsMode.Index is set by the platform-specific context constructor,
which is invoked after the X11GLControl constructor. It does not make
sense to check GraphicsMode.Index in the X11GLControl constructor, as it
is never set at that point.
In OpenTK 1.1, GraphicsMode queries the platform for a mode id lazily.
By delaying VisualInfo selection until the GraphicsContext is constructed
we ensure that a concrete GraphicsMode is selected and ready for use.
Removed OpenTK.Platform.Utilities.CreateWindowInfo and made the platform-specific CreateWindowInfo methods public (e.g. CreateX11WindowInfo).
Moved Mono Windows.Forms-specific code into X11GLControl.
Removed OpenTK.Platform.Utilities.IsIdle.
Removed obsolete methods from OpenTK.Platform.Utilities.
Marked OpenTK.Platform.Utilities.CreateGraphicsContext as obsolete (use GraphicsContext constructor instead).
Made IWindowInfo implementations private.