Scheduler - Move scroll position update from Popup to Scheduler

[aleksei-semikozov]

No description provided.

[Copilot]

Pull request overview

Moves the “scroll to edited/created appointment” behavior from the AppointmentPopup layer into the Scheduler widget, so the Scheduler owns the post-save scrolling behavior.

Changes:

• Added Scheduler.scrollToAppointment(...) and invoke it after successful add/update from the popup save callback.
• Removed popup-side “last saved edit data” state and the popup-driven scroll update logic.
• Added a Jest test to verify scrolling occurs after saving from the appointment popup.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
packages/devextreme/js/__internal/scheduler/m_scheduler.ts	Adds centralized scroll-to-appointment logic in Scheduler and hooks it into popup save flows.
packages/devextreme/js/__internal/scheduler/appointment_popup/m_popup.ts	Removes popup-managed scroll behavior and related state, leaving save flow focused on validation + persistence.
packages/devextreme/js/__internal/scheduler/tests/scheduler.test.ts	Adds coverage to ensure saving from the popup triggers scrolling to the appointment position.
packages/devextreme/js/__internal/scheduler/tests/mock/create_appointment_popup.ts	Updates the popup test mock surface to reflect removal of scroll update plumbing.