Adding animation to the find widget regressed this by adding overflow:hidden
to the terminal panel. The solution was to wrap the find widget in another
element and apply overflow:hidden to that.

See sourcelair/xterm.js#990

Fixes #34184

Fixes #34493
Fixes #34563

Fixes #33972

Improve search aria label generation performance

Fixes https://github.com/Microsoft/vscode/issues/34646

Fixes #34644

Using node 7.9.0 after  updated from Electron 1.6.6 to 1.7.3