add save-as option to query panel

[aswallace]

Context

Allow users to save the full result of a query without individually selecting files
closes #462

Changes

Adds a button to the query panel that opens the same "Download metadata manifest" modal as from the file context menu.
Still waiting on some UX feedback

Questions

Are we concerned about people trying to download the csvs for AICS without any filters applied, since that would be all of FMS (~6 million rows)? Is that something we want to prevent on the UI side or should we allow it with the assumption that people just wouldn't do that?

Testing

Manually tested:

• Downloading csv for AICS with filters applied
• Downloading csv, json, and parquet for non-AICS data sources with filters applied

Currently testing:

• Downloading without filters applied

Screenshots