Request for Application V2 support

[kgar]

Would it be possible for PopOut to add Application V2 support?

There are currently 2 issues that I know of:

• The header control does not show up
• App V2 instances are kept in foundry.applications.instances rather than window.ui.windows

I'm not sure what other issues are further in, but in my own App V2 sheets, I was attempting to add support for the header control, but PopoutModule.singleton.onPopoutClicked won't work, because window.ui.windows doesn't have my app in it 😢

If you'd like to test an App V2 sheet, my module Tidy 5e Sheets uses App V2 for Item Sheets (all items and containers) and Group Actor Sheets.