App menu items stop working

In the ESR68-based Tor Browser on macOS, the App menu items are not working. For example, choosing Quit or pressing Cmd+Q has no effect. Same for Preferences and Cmd+,

I observed this problem while testing the es-ES and en-US builds from the following location on an older macOS 10.11.6 system: https://people.torproject.org/~gk/builds/9.0a6-build4/

I will re-test on a 10.14.x system to make sure it isn't specific to macOS 10.11.x.

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