QTreeWidgetItem::insertChildren should behave like a more-optimized
QTreeWidgetItem::insertChild. Unlike the latter, the former lacks
out-of-bounds checks, resulting in successful insertions even
when using an invalid index (say, bigger than the row/column count).
Reintroduce some sanity checks instead. This allows to fix a "fixme"
left in the autotest.
[ChangeLog][QtWidgets][QTreeWidgetItem] QTreeWidgetItem::insertChildren
now ignores insertions happening at invalid indices, for
consistency with QTreeWidgetItem::insertChild.
Change-Id: I1532597768cc6aff96a6e8f356bc6075b582801d
Reviewed-by: Thorbjørn Lund Martsum <tmartsum@gmail.com>
bdcbbd7d5b