If the user clicks on undo while the transformation dialog is
open the currently active transaction will be closed.
From now on any change of the placement won't be recorded any
more so that e.g. canceling the dialog or an undo after
accepting the dialog leads to unexpected behaviour.
To fix the issue two new virtual methods onUndo() and onRedo()
are added to TaskDialog and reimplemented in TaskTransformDialog.
These functions make sure to open a new transaction.
This fixes issue 19152
* Core: Add possibility for task dialogs to associate a view and be able to close when associated view is closed.
* TaskImage: Use task dialog view association.
* Sketcher: Use task dialog view association. Preventing crash (https://github.com/FreeCAD/FreeCAD/issues/16702)
* EditableDatumLabel: Use QPointer to prevent crash
* Add TaskDialog::autoClosedOnDeletedDocument()
* Add option to automatically close task dialog when document is deleted
* Expose autoClosedOnDeletedDocument() to Python
* Expose autoClosedOnTransactionChange() to Python
* Change ControlPy::showDialog() to directly return the task dialog wrapper
* Change TaskView::slotDeletedDocument() to close task dialog if requested
