GraphEdit's AddValidConnectionType args are reversed

[ghost]

Godot version:
269145a Mono
OS/device including version:
ArcoLinux
Issue description:
AddValidConnectionType takes two arguments: fromType, and then toType. However, in order to get a right-side slot (from) to connect with a left-side slot(to), you actually have to supply the arguments in the reverse order: toType first, then fromType, despite the argument names. These should probably be swapped around, or renamed.

I'm not sure if GDScript also has this same issue or if it's another C# inconsistency.

[sheshire63]

in gd script it allows the connection if you start the connection from the "to" slot type regardless of left or right side
therefore if you allow a connection from slot type 0 to slot type 1 you connect it both ways if you start with the slot type 1

[akien-mga]

CC @godotengine/gui-nodes

[KoBeWi]

Yep, seems like they are really reversed. Not sure why there weren't other reports about it, but it doesn't affect visual editors, because connections are two-way.