[GHC] #12140: Clarify Trac menus for new reporters

[GHC]

#12140: Clarify Trac menus for new reporters
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        Reporter:  goldfire          |                Owner:  hvr
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Trac & Git        |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 > Actually, it would be pretty awesome if we could apply a slight graying
 to the fields that we don't expect visitors to fill out. I imagine that
 all tickets all the time would have this graying, but a color change
 would, I think, be less jarring to us regulars than, say, italics would
 be. And the graying has just the right connotation to visitors. (We would
 also add a sentence at the top explaining, for those who look.)

 I think this should be pretty easily done. The next question is what
 fields in particular do we want users to provide? I suggest the following,
  * Priority
  * Version
  * Operating system
  * Architecture
  * Type of failure

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12140#comment:6>
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