Decrease the default depth of field bokeh quality

This makes depth of field perform better out of the box, with little
visual difference.

doc/classes/ProjectSettings.xml

@@ -1482,7 +1482,7 @@
 		</member>
 		<member name="rendering/anti_aliasing/screen_space_roughness_limiter/limit" type="float" setter="" getter="" default="0.18">
 		</member>
-		<member name="rendering/camera/depth_of_field/depth_of_field_bokeh_quality" type="int" setter="" getter="" default="2">
+		<member name="rendering/camera/depth_of_field/depth_of_field_bokeh_quality" type="int" setter="" getter="" default="1">
 			Sets the quality of the depth of field effect. Higher quality takes more samples, which is slower but looks smoother.
 		</member>
 		<member name="rendering/camera/depth_of_field/depth_of_field_bokeh_shape" type="int" setter="" getter="" default="1">

servers/rendering_server.cpp

@@ -2831,8 +2831,8 @@ RenderingServer::RenderingServer() {
 	ProjectSettings::get_singleton()->set_custom_property_info("rendering/textures/default_filters/anisotropic_filtering_level", PropertyInfo(Variant::INT, "rendering/textures/default_filters/anisotropic_filtering_level", PROPERTY_HINT_ENUM, "Disabled (Fastest),2x (Faster),4x (Fast),8x (Average),16x (Slow)"));
 
 	GLOBAL_DEF("rendering/camera/depth_of_field/depth_of_field_bokeh_shape", 1);
-	ProjectSettings::get_singleton()->set_custom_property_info("rendering/camera/depth_of_field/depth_of_field_bokeh_shape", PropertyInfo(Variant::INT, "rendering/camera/depth_of_field/depth_of_field_bokeh_shape", PROPERTY_HINT_ENUM, "Box (Fast),Hexagon (Average),Circle (Slow)"));
-	GLOBAL_DEF("rendering/camera/depth_of_field/depth_of_field_bokeh_quality", 2);
+	ProjectSettings::get_singleton()->set_custom_property_info("rendering/camera/depth_of_field/depth_of_field_bokeh_shape", PropertyInfo(Variant::INT, "rendering/camera/depth_of_field/depth_of_field_bokeh_shape", PROPERTY_HINT_ENUM, "Box (Fast),Hexagon (Average),Circle (Slowest)"));
+	GLOBAL_DEF("rendering/camera/depth_of_field/depth_of_field_bokeh_quality", 1);
 	ProjectSettings::get_singleton()->set_custom_property_info("rendering/camera/depth_of_field/depth_of_field_bokeh_quality", PropertyInfo(Variant::INT, "rendering/camera/depth_of_field/depth_of_field_bokeh_quality", PROPERTY_HINT_ENUM, "Very Low (Fastest),Low (Fast),Medium (Average),High (Slow)"));
 	GLOBAL_DEF("rendering/camera/depth_of_field/depth_of_field_use_jitter", false);