Part of #9747

Fixes #9681

Fixes #9866

Fixes #9760

Fixes #9800

Fixes #9753

Terminal.element is focused when text is focused in the terminal, the cursor
should be styled as such.

Part of #9704

Part of #9704

Fixes #6731

When ctrl+m is pressed (only use default keybinding for now), tab will not be
passed to the pty and instead will propogate up and shift focus.

Part of #6731

Fixes #9460

Fixes #8333

Currently using the xterm.js PR branch

Fixes #7045

Fixes #6451

Fixes #8219

Part of #7095

Set LANG for terminal process and introduce setting to enable it.

Fixes #6451

For the integrated terminal

Fixes #8946

Fixes #9089

see https://basarat.gitbooks.io/typescript/content/docs/tips/nominalTyping.html and https://github.com/Microsoft/TypeScript/blob/7b48a182c05ea4dea81bab73ecbbe9e013a79e99/src/compiler/types.ts#L693-L698

Fixes #7541

Integrated terminal non-falsey shell exit codes should be reported to the UI, not just the console

This doesn't actually work due to an upstream issue

Related #8429

Fixes #8553

Fixes #8319

Fixes #8402

Fixes #8525