Always cache all panels in service worker.

script/gen-service-worker.js

@@ -30,10 +30,14 @@ var staticFingerprinted = [
   'core.js',
 ];
 
+function getDirectories(srcpath) {
+  return fs.readdirSync(srcpath).filter(function(file) {
+    return fs.statSync(path.join(srcpath, file)).isDirectory();
+  });
+}
+
 // The panels that will always be loaded
-var panelsFingerprinted = [
-  'map', 'dev-event', 'dev-info', 'dev-service', 'dev-state', 'dev-template',
-];
+var panelsFingerprinted = getDirectories('./panels');
 
 function md5(filename) {
   return crypto.createHash('md5')