When updater read fails, About Tor Browser and Quit stop working

I was running Tor Browser 7.0 on macOS 10.12.

When it tried to update to 7.0.1, org.mozilla.updater[0] temporarily failed to read ~/Library/Application Support/TorBrowser-Data/ due to some security settings I have.

When this happened, Tor Browser's "About Tor Browser" and "Quit" menu items stopped working. When I force quit and relaunched Tor Browser, the update worked well, and everything now works fine.

But we really shouldn't make the app impossible to quit (or impossible to re-try an update) just because the data directory is read-only.

[0]: /Users/USER/Library/Application Support/TorBrowser-Data/UpdateInfo/Applications/TorBrowser/updates/0/updater.app/Contents/MacOS/org.mozilla.updater

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