MacOS: Open a window if none are open when opening a new tab.

[maxkorp]

Is your feature request related to a problem? Please describe.
In iTerm, if I close my last window, then hit cmd+t (new tab), it opens a window for me (with 1 tab in it). In kitty, since no windows are open, hitting cmd+t does nothing (as far as I can tell). Obviously I can open a new window, but I tend to just nuke all of my windows then open a few tabs with a quick bit of cmd+t spam. I am aware of how small and unimportant this is in the big scheme of things, just a small convenience thing.

Describe the solution you'd like
Ideally, opening a new window when you hit cmd+t with no windows open

I'm happy to try to submit a PR for this, I just wanted to verify that there isn't some different way things work/are viewed in kitty that would in general make this undesirable.

[page-down]

... hitting cmd+t does nothing ...

I noticed this a long time ago. But what I would like to do is to gray out the "New Tab" and other items in the global menu bar.
Since there is no OS window, you can't use "New Tab" or "New Window".

So it's up to kovid to decide which way is the most appropriate.

kitty/boss.py

     @ac('tab', 'Create a new tab')
     def new_tab(self, *args: str) -> None:
+        if not self.os_window_map:
+            self.add_os_window()
         self._create_tab(list(args))

[kovidgoyal]

IMO new_window/new_tab/launch should all just create the new OS window
when needed. I dont see why we should force the user to create a new OS
window first.

[maxkorp]

Wow, already landed 😲
Thanks!