Bug 1499886 - Add send-to-device snippet, right-to-left robustness and bug fixes to Activity Stream r=k88hudson

Differential Revision: https://phabricator.services.mozilla.com/D9045

browser/components/newtab/content-src/asrouter/rich-text-strings.js

@@ -8,6 +8,7 @@ import {MessageContext} from "fluent";
 const RICH_TEXT_CONFIG = {
   "text": ["text", "scene1_text"],
   "privacy_html": "scene2_privacy_html",
+  "disclaimer_html": "scene2_disclaimer_html",
 };
 
 export const RICH_TEXT_KEYS = Object.keys(RICH_TEXT_CONFIG);