Page should not self-identify as QAccessible::PageTab

QQC2's Page self-identifies as a PageTab in qquickpage.cpp:462:

QAccessible::Role QQuickPage::accessibleRole() const
{
    return QAccessible::PageTab;
}

This seems semantically incorrect: PageTab is for tabs in PageTabLists; it's what you use to switch tabs, not the tab contents.

See the QAccessible::Role documentation:

.bq QAccessible::PageTab 0x00000025 A page tab that the user can select to switch to a different page in a dialog.

or the AT-SPI documentation:

.bq 37 - ATSPI_ROLE_PAGE_TAB: An object that is a child of a page tab list.

It's not quite clear to me what the correct role should be - possibly Pane or Grouping. But PageTab seems clearly wrong, and misleading as it makes it unclear whether the user is on the tab button that opens/switches to the page, or the page itself.