Terminals created in the background by the API will not display/retain any output until the terminal panel is initialized

[Tyriar]

Upstream issue: xtermjs/xterm.js#266

[Tyriar]

@dbaeumer FYI you will likely hit this eventually due with background tasks. Output will not be recorded until the terminal panel has been pulled up at least once.

[dbaeumer]

@Tyriar thanks for pointing this out. Yes, would not be nice since we would loose output parsing...