[GHC] #11718: Disable the Preview button on trac

[GHC]

#11718: Disable the Preview button on trac
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        Reporter:  nomeata           |                Owner:  hvr
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Trac & Git        |              Version:
      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 simonpj):

 I quite often lose edits and it's infuriating.  Eg accidentally hitting
 the back button, or thinking I'm in emacs and typing some key combination
 that does something incomprehensible but ends up nuking my edit buffer.

 I wish Trac remembered drafts, like say Gmail does.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11718#comment:1>
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