v2.0.0-beta.9

What's Changed

• fix: use inline reply editor for comments by @Xyphyn in #590
• feat: add a full markdown editor to messages page, close #578 by @Xyphyn in #592
• feat: add a modal backstack by @Xyphyn in #591

Full Changelog: v2.0.0-beta.8...v2.0.0-beta.9