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

93% of minimum 50% translated source file: 'frontend/src/i18n/en.json'
on 'hr'.

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

frontend/src/i18n/hr.json

@@ -24,10 +24,10 @@
     "ok": "OK",
     "permalink": "Dohvati trajnu poveznicu",
     "previous": "Prethodno",
-    "preview": "Preview",
+    "preview": "Pregled",
     "publish": "Objavi",
     "rename": "Preimenuj",
-    "replace": "Replace",
+    "replace": "Zamijeni",
     "reportIssue": "Prijavi grešku",
     "save": "Spremi",
     "schedule": "Zakaži",