BUG #14045: SpreadSheetView showed incorrect selected rows.

When in "Show Selected Elements Only" mode, SpreadSheetView ended up showing
bogus selected rows. Fixed that by internally switching the selectionModel on
the SpreadSheetView to an empty one when we are in selected-only mode to avoid
showing any highlighted elements.

Change-Id: I72367927cab283d0057f1c99521c4d088f3df2b3
Merge topic '14045_fix_selection_speadsheet_view_bug' into next

0a7f69a BUG #14045: SpreadSheetView showed incorrect selected rows.