Add interaction support to vtkPVOrthographicSliceView.

vtkPVOrthographicSliceView now supports double clicking to change the
slice positions in the orthographic views.

Change-Id: Ib41bb84886f2a81efa0788da6fbea066f80b42ec
Bring back vtkSITimeLabelProperty.

Bring back vtkSITimeLabelProperty for Mantid. This reverts part of the
commit c96b047.

Change-Id: I5ea5d53c249f6605a5af9793f15866f0349b63a8
Merge topic 'orthographic_view_extras'

5ef53b74 Bring back vtkSITimeLabelProperty.
4d642fac Add interaction support to vtkPVOrthographicSliceView.