Bugfix: Only render folders for move document blueprint

[madsrasmussen]

Description

Only render folders when moving a media type

How to test

• Make sure that you can only see folders in the tree when selecting a destination for the media type

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (minor updates related to the tooling or maintenance of the repository, does not impact compiled assets)