Anthony Ramine 7b40cc9fd7 Introduce VirtualMethods::children_changed() ...

This virtual method mimics the behaviour of mutation observers and make it more
viable than the older child_inserted(), which didn't cover removed nodes and
was called as many times as there were inserted nodes.

A few other shortcomings where remove_child() was called directly instead of
Node::remove() were also fixed while at it.

2015-07-25 19:09:40 +02:00

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