Core: Enable TaskDialogs to associate view (#17373)

* 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

src/Gui/TaskView/TaskImage.cpp

@@ -679,9 +679,7 @@ TaskImageDialog::TaskImageDialog(Image::ImagePlane* obj)
 {
     addTaskBox(Gui::BitmapFactory().pixmap("image-plane"), widget);
 
-    auto doc = obj->getDocument();
-    setDocumentName(doc->getName());
-    setAutoCloseOnDeletedDocument(true);
+    associateToObject3dView(obj);
 }
 
 void TaskImageDialog::open()