Release 0.9.28

• In the browser, hide the full API key when authorizing a new client or viewing keys on settings page
• Fixed a rare bug causing inaccurate aggregations on config and summary values
• Added the ability to send notifications to an external service
• Fixed an infinite update loop that could consume excessive resources when using S3
• Improved UI performance when attaching notes to a runset
• Improved performance on some run queries
• Added support for Markdown links with arbitrary text
• Fixed a bug that caused some runs to be excluded from the parallel coordinates chart
• Added close button to fullscreen view for panels