(fix) expose the json accounts call

UI/MailerUI/product.plist

@@ -342,6 +342,11 @@
           actionClass = "UIxMailMainFrame";
           actionName = "unseenCount";
         };
+        mailAccounts = {
+          protectedBy = "View";
+          actionClass = "UIxMailMainFrame";
+          actionName = "mailAccounts";
+        };
         // viewerTemplate = {
         //   protectedBy = "View";
         //   pageName    = "UIxMailViewTemplate";