Is your feature request related to a problem? Please describe.
Catalogues have 100s of catalogue items, but only a few of them are relevant to most tasks. Those are usually the Core items.
Expanding the 'Catalogue Items' container fills up the navigation pane with Internal, not extractible, deprecated etc. catalogue items, making it difficult to navigate and find items.

Describe the solution you'd like
Ideally expandable folders for each extractability class, preferably directly under the Catalogue (without the 'Catalogue Items').
Collapsed tree:

expanded core items:

Describe alternatives you've considered
Extractability class column and filter at the top of the navigation pane.
This is not as useful as the main suggestion, because it does not group items by extractability, but at least it would help reducing the amount of irrelevant information to scan through.
Excel table like filter:

Expanded filter

Additional context
Add any other context or screenshots about the feature request here.
Is your feature request related to a problem? Please describe.

Catalogues have 100s of catalogue items, but only a few of them are relevant to most tasks. Those are usually the Core items.
Expanding the 'Catalogue Items' container fills up the navigation pane with Internal, not extractible, deprecated etc. catalogue items, making it difficult to navigate and find items.
Describe the solution you'd like
Ideally expandable folders for each extractability class, preferably directly under the Catalogue (without the 'Catalogue Items').
Collapsed tree:

expanded core items:

Describe alternatives you've considered
Extractability class column and filter at the top of the navigation pane.
This is not as useful as the main suggestion, because it does not group items by extractability, but at least it would help reducing the amount of irrelevant information to scan through.
Excel table like filter:

Expanded filter

Additional context
Add any other context or screenshots about the feature request here.