Add New and Cancel buttons

Edit works. Now creation. Add a + New ticket button on the Browse screen that runs NewForm() and navigates to the Detail screen, arriving on a blank form.

Then add a Cancel button next to the form that uses ResetForm() to discard in-progress edits and navigate back without saving.

Note: ResetForm belongs on the cancel flow, not inside OnSuccess, since the form is on its way off-screen anyway after a successful save.