[INFO REQ] Deleting task + undo

[Qwerty]

(elevated to its own issue from here viewtopic.php?p=73617#p73617)

Hi,

We've found an issue when deleting a task then undoing that deletion.

Steps to Reproduce

1. Go to the undo/redo example here: https://www.bryntum.com/examples/gantt/undoredo/
2. Delete the "Run tests" task
3. Undo
4. In the browser console, run the following:
   gantt.project.taskStore.changes

There are items in both the modifications array and the added array.

The item in the added array is the biggest issue because if the user now saves, a duplicate task will be created.

Please note that there seem to be a few related issues here, not just what we've described above.

[pmiklashevich]

Replied here: viewtopic.php?p=73698#p73698
In this case the problems are about the same - updating store "changes", but thanks for your effort to split bug reports. And thanks for good quality reports - steps are really clear and it's easy to reproduce!