Fix specs randomly hanging when running in CI with electron

[brian-mann]

We've been working to try to figure out why the Electron browser randomly hangs when attempting to launch specs for awhile now.

After adding many more debug lines, I believe I've tracked it down to the line causing this problem.

I believe it is related to attempting to set the electron menu when options.show = false due to running headlessly, possibly also related to XVFB.

This batch of logs shows that it is the last thing logged before it hangs...

cypress:server:windows �instantiated browser window �16ms�
�cypress:server:windows �attaching listeners (1) �0ms�
�cypress:server:windows �attaching listeners (2) �1ms�
�cypress:server:windows �attaching listeners (3) �0ms�
�cypress:server:windows �attaching listeners (4) �0ms�
�cypress:server:browsers:electron �launching window instance �0ms�
�cypress:server:browsers:electron �setting menu �0ms�

The solution may be as simple as just not setting the menu when in headless mode. We'll rerun this build a few times and if nothing logs then I'll know for sure.