The Timeline Asset is selected and displayed in the Timeline window after a File > New operation.
This is not only wrong, but very confusing and problematic when you have a GameObject selected, locked Timeline, do File>New and end up with an Asset selected and locked in the Timeline window.

repro:
- create project
- create a GameObject
- select GameObject and create a new Timeline
- lock Timeline window
- save scene
- file > new
bug: Timeline window lost the GameObject in the scene, and displays the Timeline asset still in a "locked" state instead.
expected: Timeline window has nothing selected, displayed and is NOT in a locked state.

consequences: The current Time indicator is not displayed when an "asset" is selected and this is confusing for users. Having an asset be selected for you after a file > new brings more confusion and doesn't make sense.

this is a regression.
see attached gifs for 2019.1 vs. 2019.2 comparison

repro in...
Version 2019.2.15f1 (dcb72c2e9334)
Branch: 2019.2/staging

not repro in...
Version 2019.1.12f1 (f04f5427219e)
Branch: 2019.1/staging