Add popover for file tree browser discoverability

Joseph Fletcherrequested to merge
560578-add-discoverability-popover into master

What does this MR do and why?

Add popover for file tree browser discoverability

References

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Screenshot_2025-09-04_at_3.38.01_PM Screen_Recording_2025-09-04_at_3.36.33_PM

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Related to #560578 (closed)

Edited by Joseph Fletcher

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