2.0-rc-2

What's Changed

• feat: drag-to-scroll on navigation graph background by @hlship in #64
• feat: FAB keyboard accelerator, tooltip, and panel navigation by @hlship in #65
• feat: target-specific sources by @hlship in #66
• feat: support single keystroke input by @hlship in #69

Full Changelog: 2.0-beta-18...2.0-rc-2