D25328: Always rehiglhight() after definition was changed

[Méven Car]

meven created this revision.
meven added reviewers: kossebau, cullmann, vkrause.
Herald added projects: Kate, Frameworks.
Herald added subscribers: kde-frameworks-devel, kwrite-devel.
meven requested review of this revision.

REVISION SUMMARY
  When setting definition, Rehighlight text even if the definition has not changed.
  Useful when the dummy default definition is set, so that highlight is run even in this case.

TEST PLAN
  ctest
  In dolphin, text files content is readable in thumbnails.
  
  BUG: 409380
  FIXED-IN: 5.65

REPOSITORY
  R216 Syntax Highlighting

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D25328

AFFECTED FILES
  src/lib/syntaxhighlighter.cpp

To: meven, kossebau, cullmann, vkrause
Cc: kwrite-devel, kde-frameworks-devel, LeGast00n, GB_2, domson, michaelh, ngraham, bruns, demsking, cullmann, sars, dhaumann
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