[Nodes] EntrySupportDefault fires "parentNode" several times for the same thing

[AxelVoitier]

EntrySupport would fire "parentNode" property change several times when adding node due to it being invoked in both _notify_add and Info.use_nodes.

Even weirder, use_nodes is called in both _refresh_entry and __refresh_order.
A bit of a double whammy...

In a unit test I can see 5 invocations for a single node addition...

[
    {
        'node': MinimalNode(system_name=None, display_name=node1),
        'name': 'parentNode',
        'old': None,
        'new': MinimalNode(system_name=parent_node),
    },
    {
        'node': MinimalNode(system_name=None, display_name=node2),
        'name': 'parentNode',
        'old': None,
        'new': MinimalNode(system_name=parent_node),
    },
    {
        'node': MinimalNode(system_name=None, display_name=node2),
        'name': 'parentNode',
        'old': None,
        'new': MinimalNode(system_name=parent_node),
    },
    {
        'node': MinimalNode(system_name=None, display_name=node1),
        'name': 'parentNode',
        'old': None,
        'new': MinimalNode(system_name=parent_node),
    },
    {
        'node': MinimalNode(system_name=None, display_name=node2),
        'name': 'parentNode',
        'old': None,
        'new': MinimalNode(system_name=parent_node),
    },
]

NB: Only "node2" was added. So, some updates are even wrong as they mention node1...