Cannot scroll in integrated terminal unless hovering over text

[avarun42]

• VSCode Version: 1.2.1
• OS Version: macOS 10.11.5

Steps to Reproduce:

1. Open integrated terminal
2. Try to scroll while hovering to the right of text, but still inside terminal.

This issue becomes particularly annoying when there are long lines of text in the terminal at a point but short lines before and after. You can scroll at column 110(for example) at a specific area, but only at column 60 everywhere else.

[Tyriar]

Duplicate of #6743, coming in v1.3.0