Bug 1517988 Insert a placeholder name for addons if necessary in about:support r=Standard8

Differential Revision: https://phabricator.services.mozilla.com/D16133

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

toolkit/modules/Troubleshoot.jsm

@@ -237,8 +237,8 @@ var dataProviders = {
         return b.isActive ? 1 : -1;
 
       // In some unfortunate cases addon names can be null.
-      let aname = a.name || null;
-      let bname = b.name || null;
+      let aname = a.name || "";
+      let bname = b.name || "";
       let lc = aname.localeCompare(bname);
       if (lc != 0)
         return lc;