Improvements to Dashboards and Logs Explorer

Hover on ℹ icon on a panel to see the queries used in an overlay.
- If the panel was created via a logs query, you can click on ↗ to open the query in Logs Explorer.
- Added the option to copy a query to your clipboard.
Select multiple legends in a chart by holding down ⌘ and clicking on the necessary legends.
Pressing esc on the keyboard now closes an expanded panel.
Download results of a logs aggregation query to a CSV.