v0.7.0

What's Changed

• feat(shell): SiteIcon set, a tab bar that reads as one control, masthead tabBar prop by @catomean in #45
• Keep grouped navigation within its shell and narrow account slots by @catomean in #47
• Preserve host widget layout inside grouped actions by @catomean in #48

Full Changelog: v0.6.1...v0.7.0