Bugfix release that mainly address problems with ImCanvas after internals of ImGui changed their behavior.
- CHANGE: Canvas: Use ImDrawCallback_ImCanvas macro as draw callback sentinel (#256), thanks @nspitko
- BUGFIX: Canvas: Ensure SentinelDrawCallback cleanup (#255)
- BUGFIX: Editor: Don't call Reasume/Suspend on invisible canvas (#255)
Full Changelog: v0.9.2...v0.9.3