Auto-expand parent row when filterFromLeafRows is true and the user is searching.

[Turtleguyy]

If the table's filterFromLeafRows property is set to true, searching will also look through all the subRows; however, it leaves the parent row collapsed so the user never actually sees the match to their search.

I realize I could likely implement this as some sort of custom filtering handler and set the appropriate row's expanded property — but it seems like this should just be the default, no?