fix: cancel pending single-pane docked-tab reconciles on dispose (fixes #333537) - #333541
Approved by 3/3 collaborators
PR classified as community.
770c585 of base into PR branch, but PR-branch parent 9eeef71 is not signed by a trusted team member: Head commit was signed with fingerprint SHA256:SITOqsmcNrt9VCbafBaUD04K2PIPpa5sRlCjvqJMjSo, which is not listed for dmitrivMS as trusted.)
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✅ Collaborator approvals: 3/3 (sandy081, dbaeumer, alexr00).
✅ No newly added runnable binary files.
✅ No protected engineering system files changed.
Automation rules
✅ errors-fix automation rules passed.