feat: Translate frontend/src/i18n/en.json in uk

98% of minimum 50% translated source file: 'frontend/src/i18n/en.json'
on 'uk'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

frontend/src/i18n/uk.json

@@ -50,7 +50,7 @@
     "downloadSelected": "Завантажити вибране"
   },
   "upload": {
-    "abortUpload": "Are you sure you wish to abort?"
+    "abortUpload": "Ви впевнені, що хочете перервати?"
   },
   "errors": {
     "forbidden": "У вас немає прав доступу до цього.",