Add message box when clicking "More" in AmiiDB results list

[Schokobecher]

This should close #241

• Added _L_APP_AMIIDB_MORE_MESSAGE in English and German
• Added message box handling to amiidb_scene_amiibo_search.c
• Rebuilt language files

Pressing [More...] leads the user to this screen:

Confirming leads them back to the search result scene.

To-do: Translate _L_APP_AMIIDB_MORE_MESSAGE in other languages

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