profile: first rudimentary port of the ToolTipItem to qt-quick

Still behaves weirdly when panning the chart.

No support for moving the ToolTipItem.

Doesn't add information on bookmarks under the mouse cursor.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

qt-quick/chartitem.cpp

@@ -94,6 +94,7 @@ void ChartPixmapItem::resize(QSizeF size)
 		painter->setRenderHint(QPainter::Antialiasing);
 	}
 	rect.setSize(size);
+	setPositionDirty(); // position includes the size.
 	setTextureDirty();
 }