Update Slovenian translation

locales/sl.json

@@ -508,5 +508,13 @@
     "Standard YouTube license": "Standardna licenca YouTube",
     "Channel Sponsor": "Sponzor kanala",
     "Download is disabled": "Prenos je onemogočen",
-    "Import YouTube playlist (.csv)": "Uvoz seznama predvajanja YouTube (.csv)"
+    "Import YouTube playlist (.csv)": "Uvoz seznama predvajanja YouTube (.csv)",
+    "generic_button_delete": "Izbriši",
+    "generic_button_edit": "Uredi",
+    "generic_button_save": "Shrani",
+    "generic_button_cancel": "Prekliči",
+    "generic_button_rss": "RSS",
+    "playlist_button_add_items": "Dodaj videoposnetke",
+    "channel_tab_podcasts_label": "Poddaje",
+    "channel_tab_releases_label": "Izdaje"
 }