The diff cursor suspends the underlying cursor's scroll behavior while
the diff is rendering if the user scrolls the page before the render is
complete. However, when focus-on-move is enabled, the underlying cursor
also sets focus and this causes a scroll anyway. With this change the
cursor manager suspends the focus-on-move in the same way that it
suspends the scroll behavior to prevent this unwanted scroll/focus.
Bug: Issue 7390
Change-Id: I2bc7a06e940475b6b3c94995494f4207902acb40
b8a8ededce