Feature: Shopping List Label Section Improvements (#2090)

* added backend for shopping list label config

* updated codegen

* refactored shopping list ops to service
removed unique contraint
removed label settings from main route/schema
added new route for label settings

* codegen

* made sure label settings output in position order

* implemented submenu for label order drag and drop

* removed redundant label and tweaked formatting

* added view by label to user preferences

* made items draggable within each label section

* moved reorder labels to its own button

* made dialog scrollable

* fixed broken model

* refactored labels to use a service
moved shopping list label logic to service
modified label seeder to use service

* added tests

* fix for first label missing the tag icon

* fixed wrong mapped type

* added statement to create existing relationships

* fix restore test, maybe

frontend/lib/icons/icons.ts

@@ -8,6 +8,7 @@ import {
   mdiContentSaveEdit,
   mdiSquareEditOutline,
   mdiClose,
+  mdiTagArrowUpOutline,
   mdiTagMultipleOutline,
   mdiBookOutline,
   mdiAccountCog,
@@ -268,6 +269,7 @@ export const icons = {
 
   // Organization
   tags: mdiTagMultipleOutline,
+  tagArrowUp: mdiTagArrowUpOutline,
   pages: mdiBookOutline,
 
   // Admin