Video seeking behavior while State creation modal is open creates odd frame entries

[bctcvai]

Problem: The New State dialog doesn't prevent video seeking. If the user seeks while the modal is up, the state gets created on the frame that was open when the dialog was opened. If the video is being played or seeks occur, this may be not what the user intended.

Fix: Show the frame the object will be created at in the modal. Update on frame change if seek / play while modal is open is desirable.