SideBySide2: Disable jump keys while in side by side view

Multikey shortcuts like 'g-o' to open all changes do not work
within a CM3 instance. Drop these from the ? help dialog and
disable the bindings while the side by side view is open.

Change-Id: I3bfea5c09a1d2d9942d4235553d8b3551d5bd618
2 files changed