Fix accidental breakage of interactive X resizing
When the vtkXRenderWindowInteractor was moved to Rendering/UI (in commit b19ea9ff), the UpdateSizeNoXResize() method was inadvertently changed to be identical to the UpdateSize(), causing it to do the XResizeWindow call that it specifically says it will not do.
Backport: paraview/release
Backport: release
Edited by David Gobbi