Multi-View user interface minor tweak

There is no reason to not expand this enum as we did for 2.79.
It is self explanatory enough and it has only two options.

release/scripts/startup/bl_ui/properties_output.py

@@ -479,9 +479,7 @@ class RENDER_PT_stereoscopy(RenderOutputButtonsPanel, Panel):
         basic_stereo = rd.views_format == 'STEREO_3D'
 
         row = layout.row()
-        row.use_property_split = True
-        row.use_property_decorate = False
-        row.prop(rd, "views_format")
+        layout.row().prop(rd, "views_format", expand=True)
 
         if basic_stereo:
             row = layout.row()