v3.0.0

What's Changed

• Ensure border doesn't get obscured by thumbnails by @nyalldawson in #300
• Implement choice of styles when adding datasets by @nyalldawson in #301
• Implement popularity sorting for geographic regions by @nyalldawson in #302
• Use backend api to retrieve country listings by @nyalldawson in #303
• Implement filtering by groups by @nyalldawson in #305
• Update auth workflow to support refresh tokens by @nyalldawson in #306
• Oauth workflow changes followup by @nyalldawson in #307
• Attempt to avoid "flashing" results widget by @nyalldawson in #308

Full Changelog: v2.1.0...v3.0.0