Fix I edit profile steps
Apply fixed header in css
Remove transitions from menus for behat
Be more specific about some "I follow" steps
Navigation path changes
"Current course" node removed from nav tree
Adapt tests because there are no default blocks
Force some space between action menu items
This was a regression from MDL-46548.
I also added to the behat test to cover this, and sped up the behat test while I was there.
I also restored the behaviour where usercustomfields was hardcoded to true for all
export types except XML - but the default was false.
