Fix #29364: Shade Smooth button is misssing in curve object tools.

Added buttons to toolbar to control shading of curves and surfaces

release/scripts/startup/bl_ui/space_view3d_toolbar.py

@@ -88,7 +88,7 @@ class VIEW3D_PT_tools_objectmode(View3DPanel, Panel):
         col.operator("object.join")
 
         active_object = context.active_object
-        if active_object and active_object.type == 'MESH':
+        if active_object and active_object.type in {'MESH', 'CURVE', 'SURFACE'}:
 
             col = layout.column(align=True)
             col.label(text="Shading:")