Add initial extra info feature

Only the extra profile in profiles is shown, since it is the easiest to
implement.

Bug: twpowertools:93
Change-Id: Ife4f31ee056f74bd478702347d75044b024abf1e
diff --git a/src/static/_locales/en/messages.json b/src/static/_locales/en/messages.json
index 1c3e75b..2637808 100644
--- a/src/static/_locales/en/messages.json
+++ b/src/static/_locales/en/messages.json
@@ -151,6 +151,10 @@
     "message": "Manage workflows",
     "description": "Button in the options page which opens the workflow management page."
   },
+  "options_extrainfo": {
+    "message": "Show extra information in threads and profiles.",
+    "description": "Feature checkbox in the options page"
+  },
   "options_save": {
     "message": "Save",
     "description": "Button in the options page to save the settings"