Ensure ModifiedEvent is fired after changing ViewUp.
Fixes issue introduced by !2550 (merged). After changing ViewUp it's essential to fire modified event to not cause unforeseen sideeffects e.g. paraview/paraview#17788 (closed).
Fixes issue introduced by !2550 (merged). After changing ViewUp it's essential to fire modified event to not cause unforeseen sideeffects e.g. paraview/paraview#17788 (closed).