Misc. Bug fixes and Translation Improvments (#926)

* Fixes [BUG] Editing a location removes it from all the collections
Fixes #893

* Add new translations for Chinese and Ukrainian locales

- Updated zh.json to include new keys: "about_country", "about_region", "show_less", and "show_more".
- Registered Ukrainian locale in +layout.svelte and added it to the locales array.

* Update translation for 'back' in Dutch locale (#917)

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Co-authored-by: Sille Van Landschoot <979071+sillevl@users.noreply.github.com>

frontend/src/locales/ja.json

@@ -1034,6 +1034,10 @@
     "spin_again": "もう一度スピンします",
     "spinning_globe": "スピニンググローブ",
     "try_again": "もう一度やり直してください",
-    "your_random_adventure_awaits": "あなたのランダムな冒険が待っています！"
+    "your_random_adventure_awaits": "あなたのランダムな冒険が待っています！",
+    "about_country": "国について",
+    "about_region": "地域について",
+    "show_less": "表示を減らす",
+    "show_more": "もっと見る"
   }
 }