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/routes/+layout.svelte

@@ -22,6 +22,7 @@
 	register('pt-br', () => import('../locales/pt-br.json'));
 	register('sk', () => import('../locales/sk.json'));
 	register('tr', () => import('../locales/tr.json'));
+	register('uk', () => import('../locales/uk.json'));
 	register('hu', () => import('../locales/hu.json'));
 
 	let locales = [
@@ -42,6 +43,7 @@
 		'pt-br',
 		'sk',
 		'tr',
+		'uk',
 		'hu'
 	];