Make bookmarks optional (and fix Embed listings)

[fiskus]

• Changelog entry (skip if change is not significant to end users, e.g. docs only)

[codecov]

Codecov Report

Merging #3705 (59d6878) into master (359ca7b) will decrease coverage by 0.03%.
The diff coverage is 7.69%.

@@            Coverage Diff             @@
##           master    #3705      +/-   ##
==========================================
- Coverage   36.08%   36.05%   -0.03%     
==========================================
  Files         681      681              
  Lines       29853    29862       +9     
  Branches     4361     4379      +18     
==========================================
- Hits        10771    10768       -3     
- Misses      17962    17971       +9     
- Partials     1120     1123       +3     

Flag	Coverage Δ
api-python	91.35% <ø> (ø)
catalog	9.78% <7.69%> (-0.02%)	⬇️
lambda	86.19% <ø> (ø)

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Files Changed	Coverage Δ
catalog/app/components/Layout/Layout.tsx	0.00% <0.00%> (ø)
catalog/app/containers/Bookmarks/Sidebar.tsx	0.00% <0.00%> (ø)
catalog/app/containers/Bucket/File.js	0.00% <0.00%> (ø)
...alog/app/containers/Bucket/Selection/Dashboard.tsx	0.00% <0.00%> (ø)
catalog/app/containers/NavBar/NavBar.tsx	0.00% <0.00%> (ø)
catalog/app/containers/Bookmarks/Provider.tsx	43.28% <100.00%> (-3.20%)	⬇️
catalog/app/containers/Bucket/ListingActions.tsx	96.96% <100.00%> (+0.04%)	⬆️

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