Contact form: Fixed typo in templates_add template.
Stripe: Exposed plan list tag.
Stripe: Fixed typo in subscribe method.
Stripe: Store intervals properly.
Stripe: Moved interval map.

No need to create the same array every time.
Collection: Page control: Fixed behavior in relation to intervals.

Page control didn't wrap around with controls when wrap around is
enabled. In addition to that, interval wasn't reset on hover.