When a project file persisted FlipXAxis or FlipYAxis as true, the flag was
restored to the PdmField but never propagated to the grid nodes during
RimEclipseResultCase::importGridAndResultMetaData. Only the UI change handler
applied the flip, so on reload the grid stayed un-flipped while the checkbox
appeared active.
Mirror the call already present in RimEclipseInputCase and RimRoffCase by
invoking setFlipAxis before computeCachedData.