BColumnListView: Always update the reference rect in ::FindVisibleRect...

...if the row is present in the list, but continue to return false if the
row is not currently visible on the screen.

Part of #11675. Cherry-picked from https://review.haiku-os.org/442.

src/kits/interface/ColumnListView.cpp

@@ -4561,13 +4561,11 @@ OutlineView::FindVisibleRect(BRow* row, BRect* _rect)
 		float line = 0.0;
 		for (RecursiveOutlineIterator iterator(&fRows); iterator.CurrentRow();
 			iterator.GoToNext()) {
-			if (line > fVisibleRect.bottom)
-				break;
 
 			if (iterator.CurrentRow() == row) {
 				_rect->Set(fVisibleRect.left, line, fVisibleRect.right,
 					line + row->Height());
-				return true;
+				return line <= fVisibleRect.bottom;
 			}
 
 			line += iterator.CurrentRow()->Height() + 1;