New Crowdin updates (#1614)

public/locales/ja/settings/customization/page-appearance.json

@@ -18,10 +18,33 @@
   "background": {
     "label": "背景"
   },
+  "backgroundImageAttachment": {
+    "label": "",
+    "options": {
+      "fixed": "",
+      "scroll": ""
+    }
+  },
+  "backgroundImageSize": {
+    "label": "",
+    "options": {
+      "cover": "",
+      "contain": ""
+    }
+  },
+  "backgroundImageRepeat": {
+    "label": "",
+    "options": {
+      "repeat": "",
+      "no-repeat": "",
+      "repeat-x": "",
+      "repeat-y": ""
+    }
+  },
   "customCSS": {
     "label": "カスタムCSS",
     "description": "さらに、CSS を使用してダッシュボードをカスタマイズします。経験豊富なユーザーにのみお勧めします。",
     "placeholder": "カスタムCSSは最後に適用されます",
     "applying": "CSSを適用中..."
   }
-}
+}