macOS windows don't share the same dock icon

[ananthb]

Describe the bug
Each Neovide window that I open on macOS gets its own icon in the dock.
These new icons remain on my dock after the corresponding windows are closed.

To Reproduce
Steps to reproduce the behavior:

1. Install neovide on macOS
2. Open a neovide window
3. Open one more window
4. Optionally open another window

Expected behavior
Neovide windows share the same icon on the dock

Screenshots

Desktop (please complete the following information):

• OS: macOS 12.6
• Neovide Version 0.10.1
• Neovim Version 0.8.0

Please run neovide --log and paste the contents of the .log file created in the current directory here:
neovide_rCURRENT.log

Additional context
Add any other context about the problem here.

[caerphoto]

I could be wrong but I think this is because Neovide doesn't actually have the facility to open new app windows. Rather, you can only open entire new instances of the Neovide app (using open -n Neovide.app in terminal), which is why they don't share dock icons.

The better MacOS integration is one of the things I like about VimR, but currently it's stuck on an old version of NeoVim so it's no good at the moment.

If Neovide had a way to open new windows within the same app instance it'd be everything I need.

[MultisampledNight]

Thanks for reporting! Closing in favor of #1586.