improved docking

src/node.cpp

@@ -356,6 +356,12 @@ void Node::add_child(std::shared_ptr<Node> n, int index)
     on_child_added(n.get());
 }
 
+void Node::remove_from_parent()
+{
+    if (m_parent)
+        m_parent->remove_child(this);
+}
+
 void Node::remove_child(Node* n)
 {
     auto i = std::find_if(m_children.begin(), m_children.end(), [=](auto& ptr) { return ptr.get() == n; });