DrRacket log window broken when typing in filter box

[jbclements]

It looks to me like this is one more location that didn't get updated for the changes to the gui framework that happened to support WOB. Let me know if it's hard to reproduce this.

Steps to reproduce on macOS:

1. remove preferences file org.racket-lang.*
2. start DrRacket.
3. Choose View > Show Log
4. click in the filters box, type a character (not delete)
   See this internal error message:
   color-prefs:lookup-in-color-scheme: contract violation
   expected: known-color-scheme-name?
   given: 'framework:failed-background-color
   in: the name argument of
   (->i
   ((name known-color-scheme-name?))
   (result
   (name)
   (if (... name)
   (is-a?/c style-delta%)
   (is-a?/c color%))))
   contract from:
   /gui-lib/framework/main.rkt
   blaming: /drracket/drracket/private/unit.rkt
   (assuming the contract is correct)
   at: /gui-lib/framework/main.rkt:2095.2
   context...:
   /Users/clements/racket/racket/collects/racket/contract/private/blame.rkt:347:0: raise-blame-error
   ...b/framework/main.rkt:2096:2
   /Users/clements/racket/racket/share/pkgs/drracket/drracket/private/unit.rkt:1530:6: show/hide-log method in frame-mixin
   /Users/clements/racket/racket/share/pkgs/drracket/drracket/private/unit.rkt:1365:6: toggle-log method in tab%
   /Users/clements/gui/gui-lib/mred/private/mrmenu.rkt:250:14: command method in basic-selectable-menu-item%
   /Users/clements/racket/racket/collects/racket/private/more-scheme.rkt:148:2: call-with-break-parameterization
   /Users/clements/racket/racket/collects/racket/private/more-scheme.rkt:265:2: call-with-exception-handler
   /Users/clements/gui/gui-lib/mred/private/wx/common/queue.rkt:435:6
   /Users/clements/gui/gui-lib/mred/private/wx/common/queue.rkt:486:32
   /Users/clements/gui/gui-lib/mred/private/wx/common/queue.rkt:634:3

[jbclements]

Thanks!