Dtool-lookup-gui

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- Manage (create, edit, freeze, copy) datasets in local directories and on
remote (cloud) storage systems
- Configure dtool cloud endpoints

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- Download files from manifest

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- Show missing datasets with triangles
- Bug: Missing datasets
- Bug: Symbols in graph view

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- Warn about missing UUIDs
- Tree view for manifest (2)

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- Removed debug print

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- Show server version in status bar