The case-level RimDataFilterCollection lacked an equivalent of
RimEclipsePropertyFilterCollection::loadAndInitializePropertyFilters, so a
saved FORMATION_NAMES selection had its value preserved on reload but no
category options list to render against. The selection only appeared after
the user toggled the filter, which routes through fieldChangedByUi and
rebuilds the category cache. Add loadAndInitializeFilters and invoke it
from RimEclipseView::onLoadDataAndUpdate, once openReservoirCase has loaded
the grid and active formation names.
Kristian Bendiksen
37c6892102