Update and add missing text to locales

locales/eu.json

@@ -10,8 +10,9 @@
   "newest": "berrienak",
   "oldest": "zaharrenak",
   "popular": "ospetsuenak",
-  "Preview page": "Aurrebista orria",
+  "last": "",
   "Next page": "Hurrengo orria",
+  "Previous page": "Aurreko orria",
   "Clear watch history?": "Garbitu ikusitakoen historia?",
   "Yes": "Bai",
   "No": "Ez",
@@ -28,7 +29,6 @@
   "Export data as JSON": "Datuak JSON bezala esportatu",
   "Delete account?": "Kontua ezabatu?",
   "History": "Historia",
-  "Previous page": "Aurreko orria",
   "An alternative front-end to YouTube": "YouTuberako interfaze alternatibo bat",
   "JavaScript license information": "JavaScript lizentzia informazioa",
   "source": "iturburua",
@@ -284,5 +284,8 @@
   "Youtube permalink of the comment": "",
   "`x` marked it with a ❤": "",
   "Audio mode": "",
-  "Video mode": ""
+  "Video mode": "",
+  "Videos": "",
+  "Playlists": "",
+  "Current version: ": ""
 }