closes #141

refs #127

These form components still use bootstrap CSS classes but are part of
our effort to move away from bootstrap.

refs #140

Using :is-open="true" interferes with the dialogs close function in
nested dialogs.

This can be used in views to parse the error state from steering
responses.

We have properties like header, that contain objects that need to be
merged recursively.

Interfering with the default dialog close logic isn’t that smart because
it handles stuff like nested dialogs for us.

We need to find some other logic to close the dialog when someone clicks
on the backdrop, but that can be a task for a later time.

Using the same name as the native HTML dialog is a bad idea.

refs #89

closes #139

closes #138

We sometimes will want to use these in instanceof checks to narrow down
types so they should have been exported in the first place.

The type for new or updated data rarely is the same as the one returned
from the API as the data will likely include readonly fields that should
not be modified.

The cached result is usually sufficient and we don’t necessarily need
fresh data from the API.

API store consumers shouldn’t be able to modify the internal state of
the store.

This should make it easier to find icons, as they can now be included
directly as component:

<icon-... />

Icons can be found on: icon-sets.iconify.design

Example:
Icon at https://icon-sets.iconify.design/ph/trash/ can be used with the
following component:

<icon-ph-trash />

Not all API endpoints will have the same behaviour. Some may only allow
updates but can’t remove items, others will use a paginated result list
instead of a plain result array.

Sometimes it’s nice to let the URLBuilder build other URLBuilders.

refs #89