migrate more tests to htmlRunner

src/tests/html/navigator.html

@@ -0,0 +1,7 @@
+<script src="../testing.js"></script>
+
+<script id=navigator>
+  testing.expectEqual('Lightpanda/1.0',  navigator.userAgent);
+  testing.expectEqual('1.0',  navigator.appVersion);
+  testing.expectEqual('en-US',  navigator.language);
+</script>