Add support for multiple windows (docking panels) for the bottom panel

[WilldelaVega777]

I moved to Code from Webstorm and never regreted it, VSCode is just great, however I miss one thing which was amazing in WS and it was the support for multiple panels or tabs docked at the bottom of the screen, for example in vscode if I am debugging and have the debugging console open, I cannot see the terminal or some other useful windows that could be displayed in that area of the screen at the same time. It would be awesome to have tabs or the possibility to dock panels at the bottom to make easier switching among the different tools available. In fact, the ability to dock panels, I think, is what made Visual Studio amazing and is a feature that other editors like Atom, Brackets or Sublime totally lack.

Hopefully this is something doable and many others like the idea.

[bpasero]

/duplicate #11472

[vscodebot]

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Happy Coding!