[ENH] Implemented tooltips for download results buttons

[rmanaem]

Closes #128

Changes proposed in this pull request:

• Implemented tooltips for download results buttons
• Implemented test for the tooltips

Checklist

• PR has an interpretable title with a prefix ([ENH], [BUG], [DOC], [INFRA], [MAINT])
• PR links to Github issue with mention Closes #XXXX
• Tests pass
• Code is properly formatted

For new features:

• Tests have been added

For bug fixes:

• There is at least one test that would fail under the original bug conditions.

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[surchs]

Very cool @rmanaem 🎉! Works like a charm, ready to go 🧑‍🍳

One comment: as great as the staging-preview is, for features like this one it is pretty useless until we find a way to have the query tool default to some test api that it can actually query. at the moment I can only test this by locally checking this out.