CONN-10-updated CONN-125 Replacement of "Finishing Signing Up Modal" and adding additional tracking

More information:
* [CONN-10](https://wikia-inc.atlassian.net/browse/CONN-10)
* [CONN-125](https://wikia-inc.atlassian.net/browse/CONN-125)
* [CONN-10 to dev PR](https://github.com/Wikia/app/pull/2427)