* Only allow user type update if different from original

* Clean up user type assignment on user update

* Clean-up user type assignment on user creation

* Only set user service plan with valid IDs on creation

* Remove `services` from document when no plan is selected

* Add German translation

* Expose German language as a selectable option

* Move sub-module templates in their own `views` folder

By using `getTemplate()` we can specify which sub-module a template is
related to, enabling this behavior.
The templates names were shortened by stripping the name of their
sub-module from it since they are stored under their sub-module folder.
String templates are created using `getTemplate()` instead of
`monster.template()` that we are trying to depreciate.

* Only use `getTemplate()` for both regular and string templates