Eevee: Some changes to the Render / Render layers settings panel.

- Separate the Post Processes settings into sub panel.
- Rename "Viewport Anti-Aliasing" to sampling & super-sampling as it also reduce the noise of other effects.
- Remove Temporal Anti-Aliasing toggle and make it always active unless the number of samples is 1.

source/blender/draw/engines/eevee/eevee_engine.c

@@ -313,7 +313,6 @@ static void EEVEE_scene_layer_settings_create(RenderEngine *UNUSED(engine), IDPr
 
 	BKE_collection_engine_property_add_int(props, "gi_diffuse_bounces", 3);
 
-	BKE_collection_engine_property_add_bool(props, "taa_enable", true);
 	BKE_collection_engine_property_add_int(props, "taa_samples", 8);
 
 	BKE_collection_engine_property_add_bool(props, "ssr_enable", false);