### Godot version

4.0.stable

### System information

Windows 10, Forward+, GTX 1070 driver 528.49

### Issue description

When trying to edit the handle mode of a bezier cruve key from the inspector tab, the mode doesn't change. It works fine when right clicking on the key and setting the handle mode from here though. 

https://user-images.githubusercontent.com/24484962/222379540-29d71b6d-ff0c-4a21-9905-9750d0581fda.mp4



### Steps to reproduce

On an animation track using a bezier curve, select a key and try to change the handle mode from the inspector tab

### Minimal reproduction project

N/A
Vector<String> subindices;
	if (r_valid) {
		*r_valid = true;
	}
	switch (p_type) {
		case Variant::INT: {
			subindices.push_back("");
		} break;
		case Variant::FLOAT: {
			subindices.push_back("");
		} break;
		case Variant::VECTOR2: {
			subindices.push_back(":x");
			subindices.push_back(":y");
		} break;
		case Variant::VECTOR3: {
			subindices.push_back(":x");