Moved property type definition for "target_source"

[Adrihfu]

Related to this issue #215
where Godot saves the Object Variant Type has an null in file when empty.

Changing the type fixes it.

It was moved from TYPE_OBJECT to TYPE_STRING_NAME, which was not been used and fits the use of target_source.

[suhankins]

TYPE_STRING_NAME is used as StringName. I.e. if I have an object with property action that takes StringName, I'd need to set action in my FGD config to be StringName

[Adrihfu]

TYPE_STRING_NAME is used as StringName.

Inside the func_godot_fgd_entity_class.gd script StringName was not been check.

I.e. if I have an object with property action that takes StringName, I'd need to set action in my FGD config to be StringName

By default StringName is not been added to the FGD because is not been check in the func_godot_fgd_entity_class.gd.

You mean that a class or script that you are using recieves a StringName variable named action, right?

[suhankins]

You mean that a class or script that you are using recieves a StringName variable named action, right?

I was wrong about how it would work, my bad.