Release 0.9.40

• Added option to set a different set of options in each panel section within a workspace.
• Added option to change default panel arrangement in workspaces based on metric prefixes.
• Added toggle for "freezing" a set of runs in the project run table.
• Made a few usability improvements for custom charts.
• Optimized for a few expensive backend queries.
• Added support for writing incremental artifacts.
• Added backend support for define_metric.
• Made a few smaller UI element improvements.
• Made improvements to artifact deletion.
• Implemented live-updating comments within reports.
• Fixed a bug with our authentication layer.