It now always shows a menu, so the user doesn’t unexpectedly perform an
action.

Small changes to the e2e tests to improve the stability.

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Closes #842

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Co-authored-by: Jed Fox <git@jedfox.com>

Added onboarding and budget e2e tests. Also fixed an issue for
first-time flows using imports: currently people end up with a blank
white screen after importing. Instead they should see the budget table.

Related: https://github.com/actualbudget/actual/issues/583