MenuSorter: initial implementation

* Menus are now sanely configurable
* Custom separator placement for clearer menus

frontend/apps/reader/modules/readerhyphenation.lua

@@ -119,10 +119,10 @@ end
 
 function ReaderHyphenation:addToMainMenu(tab_item_table)
     -- insert table to main reader menu
-    table.insert(tab_item_table.typeset, {
+    self.ui.menu.menu_items["hyphenation"] = {
         text = self.hyph_menu_title,
         sub_item_table = self.hyph_table,
-    })
+    }
 end
 
 return ReaderHyphenation