ctrl+shift+up/down no longer scrolls bash on Linux

[Tyriar]

/cc @jerch (#200)

Details

• Browser and browser version: Chrome v52
• OS version: Ubuntu 16.04
• xterm.js version: 65b2be7

Steps to reproduce

1. ctrl+shift+up should scroll up 1 line
2. ctrl+shift+up should scroll down 1 line

[jerch]

@Tyriar I can add this behavior back to xterm.js - since it is not xterm compatible I'd like ask first if all agree to it.

[Tyriar]

@jerch if that's true then maybe it can just be added manually by calling scrollDisp inside attachCustomKeydownHandler? I want to add some documentation at some point to explain the power of that function.

[parisk]

If this behavior is not xterm compatible, I think we should close this issue and leave it up to vendors to implement with custom key bindings.

On OS X (where the terminal claims to be xterm) Ctrl + Shift + ↑/↓ do not scroll bash as well.