What steps will reproduce the problem?
(1) Open app window
(2) Open console and run the following:

window.open(window.location.href, "_blank", "toolbar=no");


What is the expected result?
New app window should open. The window should look the same as the current app window. Alternatively a new popup should open.

What happens instead?
The new window has an icon and the page title.

This is probably inherited from Hosted Apps. We could special case Desktop PWAs but we may want to get rid of the feature entirely.