[GHC] #15640: Add "difficulty" field to tickets

[GHC]

#15640: Add "difficulty" field to tickets
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        Reporter:  flip101           |                Owner:  hvr
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Trac & Git        |              Version:
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:  Other
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 I could have sworn that there used to be a difficulty field. In fact, you
 can still see evidence that it once existed in this comment:
 https://ghc.haskell.org/trac/ghc/ticket/8560#comment:7 . Perhaps it just
 needs to be reenabled?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15640#comment:1>
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