Show Calendar - Instance Creation Improvements

## Description of Issue
Instances are not being created efficiently using the "createInstanceShow" action. Only changed data on the instance should be sent to the backend, and then written on top of the series show it finds. Currently we are sending the entire show instead of just changes to the backend which was having the unintended effect of not allowing series changes to propagate to an unchanged instance.

Improvements to be made:
- [ ] Update anywhere the action is being used to only send required updates instead of an entire show
- [ ] On editing and instance off of the series, look into using the createInstanceShow action after the form is submitted instead of before, this will prevent creating of an instance if the user decides to cancel the instance creation.

## Possible Solution and/or Approach

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## Additional Comments

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