Update to Connect A Signal To A Method UI

[beanjbunny]

In the Connect a Signal To A Method dialogue box, in advanced settings, I would like the option to send self as an argument (as in, the signaling node is passing itself in the method). Barring that, I'd like to be able to pass a node instead of a node path.

[dalexeev]

This is already implemented for 4.5, see:

• Objects should send themselves as first argument to any signal #7166
• Add a flag to make the connection automatically emit the source object. godot#60143