improvement: icons added to prosthesis types catalog.

frontend/messages/en.json

@@ -1135,7 +1135,6 @@
     "noneYet": "None yet",
     "clearHint": "Clear this tooth removes it from the case. Use × on a chip to drop one type.",
     "removeJob": "Remove this type",
-    "regionCrown": "Crown",
     "pickerTooth": "Tooth {tooth}",
     "slotCrown": "Crown",
     "suggestionsLabel": "Suggested add-ons",

frontend/messages/fa.json

@@ -1136,7 +1136,6 @@
     "noneYet": "هنوز هیچ",
     "clearHint": "«پاک کردن این دندان» آن را از کیس حذف می‌کند. با × روی تراشه یک نوع را بردارید.",
     "removeJob": "حذف این نوع",
-    "regionCrown": "تاج",
     "pickerTooth": "دندان {tooth}",
     "slotCrown": "روکش",
     "suggestionsLabel": "افزودنی‌های پیشنهادی",

frontend/messages/nl.json

@@ -1135,7 +1135,6 @@
     "noneYet": "Nog geen",
     "clearHint": "Deze tand wissen verwijdert hem uit de case. Gebruik × op een chip om één type te verwijderen.",
     "removeJob": "Dit type verwijderen",
-    "regionCrown": "Kroon",
     "pickerTooth": "Tand {tooth}",
     "slotCrown": "Kroon",
     "suggestionsLabel": "Voorgestelde toevoegingen",