Add miter pattern options.

Will document the new options in release notes, then in manual.
Still a bit of work to do on the bulging shape that appears
on cube corners if using arc inner miters, but will do that later.
Also need to do something smarter in clamp overlap.

release/scripts/startup/bl_ui/properties_data_modifier.py

@@ -166,6 +166,11 @@ class DATA_PT_modifiers(ModifierButtonsPanel, Panel):
         layout.label(text="Set Face Strength Mode")
         layout.row().prop(md, "face_strength_mode", expand=True)
 
+        layout.label(text="Miter Patterns")
+        layout.row().prop(md, "miter_outer")
+        layout.row().prop(md, "miter_inner")
+        layout.row().prop(md, "spread")
+
     def BOOLEAN(self, layout, ob, md):
         split = layout.split()