Bug 1577768 - add toggle.svg to whitelist of referenced files for non-central repositories. r=mstriemer

It got added in bug 1533863 for the new about:config page (bug 1493439) which is currently on enabled in Nightly (bug 1532703).

Differential Revision: https://phabricator.services.mozilla.com/D44192

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

browser/base/content/test/static/browser_all_files_referenced.js

@@ -279,6 +279,11 @@ if (!isDevtools) {
   }
 }
 
+if (!AppConstants.NIGHTLY_BUILD) {
+  // Bug 1532703 - only used in HTML-based about:config
+  whitelist.add("chrome://browser/skin/toggle.svg");
+}
+
 if (AppConstants.MOZ_CODE_COVERAGE) {
   whitelist.add("chrome://marionette/content/PerTestCoverageUtils.jsm");
 }