Add unsaved changes localizations

public/locales/en/common.json

@@ -11,6 +11,10 @@
     "manadiver": "manatura"
   },
   "alert": {
+    "unsaved_changes": {
+      "party": "You will lose all changes to your party <strong>{objectName}</strong> if you continue.<br/><br/>Are you sure you want to continue without saving?",
+      "object": "You will lose all changes to <strong>{objectName}</strong> if you continue.<br/><br/>Are you sure you want to continue without saving?"
+    },
     "incompatible_weapon": "You've selected a weapon that can't be added to the Additional Weapon slots."
   },
   "ax": {

public/locales/ja/common.json

@@ -11,6 +11,8 @@
     "manadiver": "マナベリ"
   },
   "alert": {
+    "unsaved_changes_party": "<strong>「{objectName}」</strong>という編成の変更は保存していません。<br/><br/>変更を保存せずに続けますか？",
+    "unsaved_changes_object": "<strong>「{objectName}」</strong>の変更は保存していません。<br/><br/>変更を保存せずに続けますか？",
     "incompatible_weapon": "Additional Weaponsに装備できない武器を入れました。"
   },
   "ax": {