Remove shop-tabs controllers since we can listen on `"data-action":
"orderCycleSelected@window->tabs-and-panels#activateDefaultPanel"`
Test for cases:
* activate by clicking on tab
* activateDefaultPanel on orderCycleSelected event
* activateFromWindowLocationOrDefaultPanelTarget to activate tab based
on achor in URL
I think that it's a valid case to check a feature toggle against the
user and an enterprise. You may want to check with only one user first,
then activate it for a whole enterprise and lastly activate the feature
globally.
I also kept the per-user check to be backwards-compatible. Some
instances have that enabled already. And for early testing, you may want
to test with only one user first before all customer see it.
