Add global control over disabling high-resolution smoke draw

Can be found in the viewport's simplify panel, allows to easily
disable high-res display for all the smokes in the scene.

release/scripts/startup/bl_ui/properties_render.py

@@ -614,6 +614,9 @@ class RENDER_PT_simplify_viewport(RenderButtonsPanel, Panel):
         col = flow.column()
         col.prop(rd, "simplify_child_particles", text="Max Child Particles")
 
+        col = flow.column()
+        col.prop(rd, "use_simplify_smoke_highres")
+
 
 class RENDER_PT_simplify_render(RenderButtonsPanel, Panel):
     bl_label = "Render"