Migrate to new course navigation, by fixing the following:

• Removing "I am on site homepage", "I am on course index" and "I am on homepage" steps prior to navigating to the course (no longer necessary as new step does not depend on current page).
• Actually use the new step for navigating to the course, EG: "I am on "Course 1" course homepage".
• And use "I am on "Course 1" course homepage with editing mode on" step when the following line was "I turn editing mode on" step.

So, in some cases, it can replace 2-3 steps with 1 step or at the very least, replace a step with a faster one.

This was all done with regex, so there might be places where the steps are not next to each other, but could have been simplified. Those would require perhaps more manual searching/fixing.