Fix Examples/GUI/Qt/FourPaneViewer

QVTK does not exist anymore, use VTK_LIBRARIES instead.

vtkResliceImageViewer::SetInputConnection does not work,
and formerly emitted an error saying "Use SetInput" instead.

But there is no more SetInput, so the error message should
say "Use SetInputData"...

Updated the error message, and updated the example to avoid
the error message.

Change-Id: I64b6943dedc9956e7d6892d645356c2ffc87ad13
Comment only change to eliminate dashboard warning

    warning: '@struct' command should not be used in a
    comment attached to a non-struct declaration

Change the offending '@struct' to '@type'

Change-Id: If00cf5d07eec400866e0f31f7b760fde45de5965
Merge topic 'eliminate-documentation-warning' into master

470f7bb0 Comment only change to eliminate dashboard warning
Merge topic 'fix-Examples-GUI-Qt-FourPaneViewer' into master

d7075681 Fix Examples/GUI/Qt/FourPaneViewer