Support multiple windows

Description

Previost native version had option to open new window what was handy for working on multiple repositories at once. Electron version does not support it, so I have to switch between project in one window what is in some use-cases very uncomfortable.

Work around is to keep old native version and run it if I need to work on multiple repos simultaneously.

Version

GitHub Desktop version: 1.0.10

OS version: macOS High Sierra

Expected behavior: Menu option File → New window will be there

Actual behavior: Menu option File → New window is not there

Reproduces how often: Always

[ledermann]

One thing to notice: Without having the “multiple windows” feature, on macOS we can’t use GitHub Desktop on multiple Spaces within Mission Control.

While working on multiple projects concurrently, I like to have a separate Space for every project (containing windows for Atom, Chrome, iTerm2 etc.). But because GitHub Desktop can live at only one Space at a time, I always have to move GitHub Desktop to the right Space for just doing a commit, which is a little bit annoying.

[andybak]

I’d be interested to hear why multiple windows was considered and rejected. It seems such an obviously better approach to the current one and much less “unusual” (unusual is usually a bad thing in UX…)