Bug 1592268 - Make the permanent search icon a bookmarks doorhanger anchor. r=mak

Differential Revision: https://phabricator.services.mozilla.com/D51814

--HG--
extra : moz-landing-system : lando

browser/base/content/browser-pageActions.js

@@ -422,6 +422,7 @@ var BrowserPageActions = {
       action && this.urlbarButtonNodeIDForActionID(action.id),
       this.mainButtonNode.id,
       "identity-icon",
+      "urlbar-search-icon",
     ];
     for (let id of potentialAnchorNodeIDs) {
       if (id) {