Migrate cue_with_catch to cue(:&catch)

Also some left-behind schedule_* fixes.  Unfortunately, specifying a :catch()
currently blows up:

Unhandled exception: Method 'postcircumfix:<( )>' not found for invocant of class 'Scalar'
  in  (gen/jvm/BOOTSTRAP.nqp:1675)

Will look at this tomorrow, unless someone else beats me to this