Use monochrome symbol for directory tree

[jonesbusy]

Before

After

(default)

(dark)

Testing done

Only checking visual

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue

[basil]

I don't mind approving this if necessary, but I must admit that the new image looks worse than the original one to me. The original one is very clearly a folder with subfolders. I'm not sure what the second image represents. It looks more like the pins of a microprocessor to me and it is not obviously a folder/subfolders at all.

[jonesbusy]

I will try to do an other proposal

[jonesbusy]

Does it look more like subdirectories now ?