properly close task dialog when document is getting closed

src/Mod/PartDesign/Gui/Command.cpp

@@ -571,8 +571,13 @@ void CmdPartDesignNewSketch::activated(int iMsg)
             Gui::Command::doCommand(Gui,"Gui.activeDocument().setEdit('%s')",FeatName.c_str());
         };
 
-        // Called by dialog for "Cancel", or "OK" iff accepter returns false
-        auto quitter( Gui::Command::abortCommand ); 
+        // Called by dialog for "Cancel", or "OK" if accepter returns false
+        std::string docname = doc->getName();
+        auto quitter = [docname]() {
+            Gui::Document* document = Gui::Application::Instance->getDocument(docname.c_str());
+            if (document)
+                document->abortCommand();
+        };
 
         if (validPlaneCount == 0) {
             QMessageBox::warning(Gui::getMainWindow(), QObject::tr("No valid planes in this document"),

src/Mod/PartDesign/Gui/TaskFeaturePick.cpp

@@ -449,6 +449,12 @@ void TaskFeaturePick::slotUndoDocument(const Gui::Document&)
     }
 }
 
+void TaskFeaturePick::slotDeleteDocument(const Gui::Document&)
+{
+    origins.clear();
+    QTimer::singleShot(100, &Gui::Control(), SLOT(closeDialog()));
+}
+
 void TaskFeaturePick::showExternal(bool val)
 {
     ui->checkOtherBody->setChecked(val);

src/Mod/PartDesign/Gui/TaskFeaturePick.h

@@ -77,6 +77,8 @@ protected:
     virtual void slotDeletedObject(const Gui::ViewProviderDocumentObject& Obj);
     /** Notifies on undo */
     virtual void slotUndoDocument(const Gui::Document& Doc);
+    /** Notifies on document deletion */
+    virtual void slotDeleteDocument(const Gui::Document& Doc);
 
 private:
     Ui_TaskFeaturePick* ui;