Fix subscription for latestApiBackends template

[brylie]

PR #727 was merged with a global subscription. Update the latestApiBackends template to use a template level subscription.

Subscriptions should happen in the Template.created callback, rather than within template helpers. They should be attached to the template instance, rather than globally.

Template.latestApiBackends.created = function () {
  // Get named reference to Template instance
  let instance = this;

  // Subscribe to latest API Backends, template level
  instance.subscribe("latestApiBackends");
};

Please issue a hotfix pull-request for this subscription issue.

References

• Meteor Pattern: Template-Level Subscriptions
• Using Template-Level Subscriptions with Blaze

[brylie]

@frenchbread or @jykae would you please consider contributing this small hotfix?

[frenchbread]

I'll take this one.

[frenchbread]

Created PR #748. Please review.