Allow Decal Emission Energy values above 128 in the inspector

This also sets the maximum value for the slider to 16 to match
BaseMaterial3D (higher values can be entered or dragged manually).

scene/3d/decal.cpp

@@ -231,7 +231,7 @@ void Decal::_bind_methods() {
 	ADD_PROPERTYI(PropertyInfo(Variant::OBJECT, "texture_emission", PROPERTY_HINT_RESOURCE_TYPE, "Texture2D"), "set_texture", "get_texture", TEXTURE_EMISSION);
 
 	ADD_GROUP("Parameters", "");
-	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "emission_energy", PROPERTY_HINT_RANGE, "0,128,0.01"), "set_emission_energy", "get_emission_energy");
+	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "emission_energy", PROPERTY_HINT_RANGE, "0,16,0.01,or_greater"), "set_emission_energy", "get_emission_energy");
 	ADD_PROPERTY(PropertyInfo(Variant::COLOR, "modulate"), "set_modulate", "get_modulate");
 	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "albedo_mix", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_albedo_mix", "get_albedo_mix");
 	// A Normal Fade of 1.0 causes the decal to be invisible even if fully perpendicular to a surface.