NFC user dict list, delete, and de-duplication. (#1533)

* Add MFC user keys list
* Leakey submenu fix
* Set next target for Save/Delete success scenes
* Delete individual user keys
* Update count of total keys
* Fix memory leak
* Check for duplicate keys
* Remove a submodule that I never added?
* Swap and position icons
* Revamp according to design doc
* Rename icons to include size and replace keychain icon with smaller variant
* Fix typos
* Final fixes
* Fufill requested changes
* Cleanup comments
* Merge dev after SD app loading
* Fixing icon names
* Revert merge mistakes and API version
* Scene switching adjustments
* F7: add/change/remove some nfc icons in api_symbols.csv

Co-authored-by: あく <alleteam@gmail.com>

.vscode/example/settings.json

@@ -22,4 +22,4 @@
         "SConstruct": "python",
         "*.fam": "python",
     }
-}
+}