feat: move core menu logic to wuttaweb

tailbone still defines the default menus, and allows for making dynamic
menus from config (which wuttaweb does not).

also remove some even older logic for "v1" menu functions

tailbone/handler.py

@@ -24,6 +24,8 @@
 Tailbone Handler
 """
 
+import warnings
+
 from mako.lookup import TemplateLookup
 
 from rattail.app import GenericHandler
@@ -46,11 +48,14 @@ class TailboneHandler(GenericHandler):
 
     def get_menu_handler(self, **kwargs):
         """
-        Get the configured "menu" handler.
-
-        :returns: The :class:`~tailbone.menus.MenuHandler` instance
-           for the app.
+        DEPRECATED; use
+        :meth:`wuttaweb.handler.WebHandler.get_menu_handler()`
+        instead.
         """
+        warnings.warn("TailboneHandler.get_menu_handler() is deprecated; "
+                      "please use WebHandler.get_menu_handler() instead",
+                      DeprecationWarning, stacklevel=2)
+
         if not hasattr(self, 'menu_handler'):
             spec = self.config.get('tailbone.menus', 'handler',
                                    default='tailbone.menus:MenuHandler')