In order to improve the performance and flow of creating a new file
from a template, the `setFields` method will be deprecated and we
instead use a new property, `setFieldsUrl`, which allows apps to
specify an endpoint for extracting the template fields. This endpoint
is used by the template picker to request the fields only once the
user has selected a template, instead of fetching all template fields
before opening and causing a terribly slow experience.
Signed-off-by: Elizabeth Danzberger <lizzy7128@tutanota.de>
9112dce051