Open a non-existed file from a command line issue

[sgon00]

When I execute marktext foo.md and foo.md is not existed.

Case 1: when there is no running marktext instance

What I expect: marktext should be launched with titled foo.md. Then I can simply use Ctrl+S to save the file as the name foo.md.

Current behavior: marktext will launch with Untitled title.

Case 2: when there is a running marktext instance

What I expect: marktext should open a new tab with the title name foo.md.

Current behavior: marktext doesn't do anything.

Thanks a lot.

[brainchild0]

For case (2), compared to opening a new tab, opening a new window may be more desirable

[cbajgier]

Without this, marktext cannot be used as an external editor for jrnl.