Open the mobile navigation menu via the header toggle button.
Examples
When I open the mobile navigation menu
When we open the mobile navigation menu
When I open the mobile menu
When open the mobile menu
And I open the mobile navigation menu
Pattern
When(/^(I |we )*open the mobile (?:navigation menu|menu)$/, …)
Part of @webship-js/squarespace-steps (github.com/webship/squarespace-steps), a step pack for Webship-js 2.0.x.