Refs #7212. Forcing display update to set plot axes.

Due to the mechanism used to generate the SliceViewer views from the VSI
MultiSlice view, when a rebinner was used to reorient the axes, a mismatch
arose between the cached dimensions and the workspace dimensions. I've forced
an axis update to ensure that things are commensurate. The change is done in a
function that is ONLY called by the shift-click mechanism in the MultiSlice
view. This limits the side effects to this change.
(cherry picked from commit 1056e0bac06163bd32d0fa1732ad469344012e25)
Refs #7212. Fixing issue with integrated "time" dimension in VSI.

This fix was necessary to handle an annoying issue with the SEQ_MDEW.nxs file.
When the SliceViews were generated by the shift-click mechanism, they kept
coming out blank. I traced this due to a bad time value being handed to the
SliceViewer. Datasets with an integrated time axis need to be treated slightly
more carefully.
(cherry picked from commit ded2416632d6b5db239be1ed223039fb695df0cc)
Merge remote-tracking branch 'origin/bugfix/7212_ms_vs_incorrect'