Sergey

I don't really see why tabs should be treated differently. Am I missing something?

isn't this it https://github.com/microsoft/microsoft-ui-xaml/issues/5983 ?

Would it be ok add them to `ParseTrickyCommandlines` or `ParseSimpleCommandline`? Is testing that one-character argument parsed correctly enough or are there more test cases that need to be added?

I think it shouldn't be visible at all at this point. This happens after SUI is oppened and nav panel should not be shown.

I don't think that changing location of an existing window is natural. Are there any applications where this is implemented? And I think it's reasonable to expect user to add...

maybe `_MakePane(newTerminalArgs, bool duplicate, existingConnection)` should accept something like `const TerminalTab& sourceTab` instead of `bool duplicate`? That way `_DuplicateTab` will pass the tab to `_MakePane` and it should work.

I also have a default profile open when I press alt+space after closing the tab and click on the titlebar. Tested at commit 4c7879bfb5745702738d37a5e1e50e22cbba4961 https://user-images.githubusercontent.com/45919738/213252168-05a796c4-326b-4c81-95e3-0ac5c64411f4.mp4