login-links.js config for login page handler is wrong type

[bmcminn]

The [data-mz-action="loginpage-submit"] binding in product.js is initialized as new SignupPopover() instead of new LoginPopover(), which causes it to go down a wierd code path that doesn't trigger a proper redirect to the myaccount view.

https://github.com/Mozu/core-theme/blob/master/scripts/modules/login-links.js#L316-L317

The second part to this is changing the handleLoginComplete method to check for the redirectTemplate so that we can redirect the user as needed.

My changes to fix this can be seen in this commit on my personal theme: bmcminn/mozu-demo-theme@16419b4?w=0