fix: Infinite loading when errors retrieving data

[Zoramite]

When data is being retrieved from the api it handles the error and displays a notification, but the next render tries to reload the same api call since the value is still undefined.

This change gives a null value for data in the state for the values that are loaded without arguments and adds helper functions that trigger the api calls if the value is undefined but not if it is null. This makes it simpler for the UI to use the state without having to know and handle the null state and still allow for lazy loading of the data.

fixes #128