[TW-114] Dialog when breaking a dependency chain should default to fix

_Cory Donnelly on 2011-03-29T19:28:45Z says:_

What do you guys think about changing the following dialog to (Y/n)? I think it'll be rare for a user to want to not repair dependency chains in this sort of situation.

1.  task do 2

Task 2 is blocked by:

  1 One

and is blocking:

  3 Three

Would you like the dependency chain fixed? (y/n)

Would you like the dependency chain fixed? (y/n)

Would you like the dependency chain fixed? (y/n)