v0.19.1

Fixes

• Errors when authenticating Slack commands from a team subdomain
• The block toolbar now hides automatically when clicking to focus the document
• The block insert menu no longer appears when hovering an embed
• A message is now displayed when copying a link to a heading in a shared document
• "Your Teams" menu item no longer erroneously shows up on content pages when logged into a single non-subdomain team.