QTreeView::header corners drawn incorrectly with Style Sheet.

Setting round corners are overridden by the header on the QTreeView.

It occurs with all styles. Tested on Linux.

This Style Sheet will repoduce the error.

/* Definitions for the treeview & header */
QTreeView
{
border-radius: 5px;
border-width: 1.3px;
border-style: solid;
}

QTreeView QHeaderView:section
{
border-left: none;
border-top: none;
border-bottom: 1px solid rgb(181, 182, 200);
border-right: 1px solid rgb(181, 182, 200);
}