Make email import dialog translatable

src/translation/en.json

@@ -1134,7 +1134,9 @@
                 "name": "Name",
                 "owner": "Owner",
                 "aliases": "Aliases",
-                "usage": "Usage"
+                "usage": "Usage",
+                "importTooltip": "Import Mailboxes",
+                "exportTooltip": "Export Mailboxes"
             },
             "mailinglists": {
                 "title": "Mailing Lists",
@@ -1282,7 +1284,16 @@
             "activeCheckbox": "Mailbox is active",
             "enablePop3": "Enable POP3 access"
         },
-        "howToConnectInfoModal": "Configuring Email Clients"
+        "howToConnectInfoModal": "Configuring Email Clients",
+        "mailboxImportDialog": {
+            "title": "Import Mailboxes",
+            "description": "The import requires a specific schema for JSON. The detailed schema is described in our <a href=\"{{ docsLink }}\" target=\"_blank\">documentation</a>",
+            "fileInput": "Select JSON file",
+            "mailboxesFound": "Found {{ count }} mailboxes to import",
+            "success": "{{ count }} mailboxes successfully imported.",
+            "failed": "The following mailboxes were not imported:",
+            "importAction": "Import"
+        }
     },
     "app": {
         "backAction": "Back to My Apps",