Handle invisible nodes (Nodes under Pending Bookmarks and itself) in bookmarks reducer

[darkdh]

fix brave/brave-browser#2579

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Verified that these changes build without errors on
  • Windows
  • macOS
  • Linux
• Verified that these changes pass automated tests (npm test brave_unit_tests && npm test brave_browser_tests) on
  • Windows
  • macOS
  • Linux
• Ran git rebase master (if needed).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.
• Request a security/privacy review as needed.
• Add appropriate QA labels (QA/Yes or QA/No) to include the closed issue in milestone

Test Plan:

1. Setup sync chain between device A and device B
2. Wait until device list is synced on all device
3. Add a bookmark/folder on device A
4. Wait for it to appear on device B (for first time bookmark fetch to ensure it will use SQS in the future)
5. Import 1000 or more bookmarks on device A
6. Open bravee://bookmarks/ along with the console
7. Wait until all bookmarks are synced on device B
8. There shouldn't be any errors in the console of bravee://bookmarks/

Reviewer Checklist:

• New files have MPL-2.0 license header.
• Request a security/privacy review as needed.
• Adequate test coverage exists to prevent regressions
• Verify test plan is specified in PR before merging to source

[AlexeyBarabash]

++

[darkdh]

master: 78fd6b8
0.60.x: 630bb53
0.59.x 27ebc03

[cezaraugusto]

pr requesting uplift approval to 59 at #1225

[cezaraugusto]

0.59.x 27ebc03