Adding window/panes to current session

[felka]

Hi,
Using tmux 2.3.0 in Iterm2 v3.
Trying to add window to current session with following config:

session_name: current
windows:
- layout: main-vertical
  panes:
  - ssh -o ConnectTimeout=5 user@host
  - ssh -o ConnectTimeout=5 user@host
  - ssh -o ConnectTimeout=5 user@host
  window_name: ssh-panes

tmuxp load test asks me if I want to attach to current session. Once I answer "Y" it does nothing.

[tony]

I'm open to approaches for this.

[stale]

This issue has been automatically marked as stale because it has not had
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[joseph-flinn]

Feature added with PR #656