Add missing parameters for signal in docs

(cherry picked from commit 0e3097c023fa4562d44fa102bd2ef8e456f8901a)

doc/classes/EditorProperty.xml

@@ -90,6 +90,8 @@
 		<signal name="property_changed">
 			<argument index="0" name="property" type="String" />
 			<argument index="1" name="value" type="Variant" />
+			<argument index="2" name="field" type="String" />
+			<argument index="3" name="changing" type="bool" />
 			<description>
 				Do not emit this manually, use the [method emit_changed] method instead.
 			</description>

editor/editor_inspector.cpp

@@ -758,7 +758,7 @@ void EditorProperty::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "checked"), "set_checked", "is_checked");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "draw_red"), "set_draw_red", "is_draw_red");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "keying"), "set_keying", "is_keying");
-	ADD_SIGNAL(MethodInfo("property_changed", PropertyInfo(Variant::STRING, "property"), PropertyInfo(Variant::NIL, "value", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NIL_IS_VARIANT)));
+	ADD_SIGNAL(MethodInfo("property_changed", PropertyInfo(Variant::STRING, "property"), PropertyInfo(Variant::NIL, "value", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NIL_IS_VARIANT), PropertyInfo(Variant::STRING, "field"), PropertyInfo(Variant::BOOL, "changing")));
 	ADD_SIGNAL(MethodInfo("multiple_properties_changed", PropertyInfo(Variant::POOL_STRING_ARRAY, "properties"), PropertyInfo(Variant::ARRAY, "value")));
 	ADD_SIGNAL(MethodInfo("property_keyed", PropertyInfo(Variant::STRING, "property")));
 	ADD_SIGNAL(MethodInfo("property_keyed_with_value", PropertyInfo(Variant::STRING, "property"), PropertyInfo(Variant::NIL, "value", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NIL_IS_VARIANT)));