Feature request: Support macOS 'reopen windows when logging back in'

[Jensenks]

• I have searched open and closed issues for duplicates

---

Bug description

I guess this is more of a feature request.

On macOS Signal doesn't reopen to its original position when using the option "Reopen windows when logging back in" when restarting or shutting down.
For instance, I have a space (desktop) with mail and calendar and a space with Signal and Slack. The rest of these apps opens to their original position when logging back in. Signal doesn't.

Steps to reproduce

1. Move Signal to other space (macOS fullscreen mode)
2. Restart or shutdown, selecting the option "Reopen windows when logging back in"
3. When logging back in, Signal doesn't open up in the selected space.

Screenshots

Platform info

Signal version: 1.12.0

Operating System: macOS High Sierra

Linked device version: 10.13.4