Hotbars+ v2.0 Prerelease 6

This is the sixth official prerelease build of Hotbars+ v2. It is still missing some features from v1.x currently (such as load and save failure detection), however I hope to bring them back as I get closer to the final version.

What's new from v2.0-pre5:

• Fixes crash caused by tray integration not initializing properly (#23)
• Fixes oversight where error stacktraces would not show up in the logs (#24)

Full Changelog: v2.0-pre5...v2.0-pre6