### Godot version

9f12e7b52d944

### System information

arch linux

### Issue description

Attempting to edit from the editor a typed array exported from a tool script fails, any value is immediately reset, setters are never called.

### Steps to reproduce

Create a script such as follows and try to add and then change items of the array in the inspector.


```gdscript
@tool
extends Node

@export var x: Array[String]
```

### Minimal reproduction project

n/a
double val = get_edited_property_value();
	if (angle_in_radians) {
		val = Math::rad_to_deg(val);
	}
	setting = true;
	spin->set_value(val);
	setting = false;
}
void EditorPropertyFloat::_bind_methods() {
}
void EditorPropertyFloat::setup(double p_min, double p_max, double p_step, bool p_hide_slider, bool p_exp_range, bool p_greater, bool p_lesser, const String &p_suffix, bool p_angle_in_radians) {
	angle_in_radians = p_angle_in_radians;
	spin->set_min(p_min);
	spin->set_max(p_max);
	spin->set_step(p_step);
	spin->set_hide_slider(p_hide_slider);
	spin->set_exp_ratio(p_exp_range);
	spin->set_allow_greater(p_greater);
	spin->set_allow_lesser(p_lesser);
	spin->set_suffix(p_suffix);
}
EditorPropertyFloat::EditorPropertyFloat() {
	spin = memnew(EditorSpinSlider);
	spin->set_flat(true);
	add_child(spin);
	add_focusable(spin);
	spin->connect("value_changed", callable_mp(this, &EditorPropertyFloat::_value_changed));
}
void EditorPropertyEasing::_set_read_only(bool p_read_only) {