[Electron] [Feature] Single chat view

[ghost]

• I have searched open and closed issues for duplicates

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Single chat

Telegram allows to shrink the window to "single chat", this allows to use your screen more efficient.

Steps to reproduce

• Shrink your Signal-Desktop window

Actual result: Shrinking is not allowed to a specific width
Expected result: Shrinking the window results single chat and contact view (see below)

Workflow is inspired by the mobile applications (click on arrow get's back to contact view).

Screenshots

Actual result

Mockups

Single chat view

Contact view

Platform info

Operating System: Multi-Platform
Signal version: Signal-Desktop 1.0.27

Pull request

@scottnonnenberg and @liliakai: Can you share your opinion to this?

[christianfl]

I really like that idea - I think of using Signal on really small screens. That will be important in the future if linux for smartphones gained more attention (like Plasma Mobile or Purism with PureOS and maybe an adaption of GNOME).