mailbox: storage quota slider

src/translation/en.json

@@ -1292,7 +1292,8 @@
             "aliases": "Aliases",
             "noAliases": "No aliases are configured.",
             "addAliasAction": "Add an alias",
-            "addAnotherAliasAction": "Add another alias"
+            "addAnotherAliasAction": "Add another alias",
+            "enableStorageQuota": "Enable Storage Quota"
         },
         "deleteMailboxDialog": {
             "title": "Delete mailbox {{ name }}@{{ domain }}",
@@ -1794,5 +1795,10 @@
         "mounts": {
             "description": "Apps can access mounted <a href=\"/#/volumes\">volumes</a> via <code>/media/{volume name}</code> directory. This data is not included in the app's backup."
         }
+    },
+    "mailboxes": {
+        "edit": {
+            "unlimitedStorageQuota": "Unlimited"
+        }
     }
 }