kalabox/kalabox#873: Add stack trace to guiEngine tasks (possibly temporary just for development).
kalabox/kalabox#873: Add stack trace to guiEngine tasks (possibly temporary just for development).

kalabox/kalabox-ui,pirog/kalabox-ui,kalabox/kalabox-ui,pirog/kalabox-ui,kalabox/kalabox-ui