[DMN Designer] Active entries not highlighted correctly when scrolling

The behavior described below was spotted during DROOLS-2398 review, however probably not related to that jira.

If context table is so big user has to scroll down to see all entries. then the active entries are not highlighted correctly. Next if user select some cell, then scroll (so the originally selected cell is not visible more) and select another cell, both remains selected. I mean selection without holding any additional key.

Acceptance criteria

• As active entry is highlighted just that context entry that is parent of the selected cell.
• Just one cell will be selected - clicking mouse without holding CTRL on keyboard
  • when no scrolling between clicks (selecting cells)
  • when scrolling between clicks (selecting cells)
• Multiple cells selection - clicking mouse and holding CTRL on keyboard
  • when no scrolling between clicks (selecting cells)
  • when scrolling between clicks (selecting cells)
• Steps to reproduce fixed
• Undo / redo
  • Change selected cell, do not scroll between selection, check if undo / redo highlights correctly
  • Change selected cell, scroll between selection, check if undo / redo highlights correctly
  • Change selected multiple cells, do not scroll between selection, check if undo / redo highlights correctly
  • Change selected multiple cells, scroll between selection, check if undo / redo highlights correctly
  • Not checked as command history doesn't contain selections (clicks), probably it is fine, not reporting issue