bug: window titles are not showing up in macOS

[notfilippo]

Describe the bug Titles in the webview window are not showing up in macOS when running examples in this repo.

To Reproduce Run the examples in a macOS machine.

Expected behavior The title "TEST" should appear in the top of this window.

Screenshots Screenshot of window opened with the sample example:

Platform and Versions (please complete the following information):

OS: 64bit Mac OS X 10.15.6 19G73 Rustc: rustc 1.45.0 (5c1f21c3b 2020-07-13)

[wusyong]

Hmm, it can't show the title in original repo either. Maybe we should also file a issue there.