QTaskTree: Fix for Axivion SV9


Fix possible detach in range-based for loop.

Pick-to: 6.11
Task-number: QTBUG-146069
Axivion-Id: qt_Add-ons_qttasktree_dev_linux:SV9
Change-Id: Iced24d6c8113cd8f753a041e752455af9c6d3c6b
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
commit8545ea9da93e28246ea928c98a009e4318179ab8
parenta3a5d7b37f2da3ce07aa73a7c9b4f22dc0044a4e
authorJarek Kobus <jaroslaw.kobus@qt.io>
committerJarek Kobus <jaroslaw.kobus@qt.io>
commit timeWed, 6 May 2026 10:07:13 +0000