D21007: Review kate config pages to improve maintenance friendliness

[loh tar]

loh.tar created this revision.
loh.tar added a reviewer: KTextEditor.
Herald added projects: Kate, Frameworks.
Herald added subscribers: kde-frameworks-devel, kwrite-devel.
loh.tar requested review of this revision.

REVISION SUMMARY
  - Use new signal/slot style by new added helper functions
  - Unified comments, added some new, removed some obsolete

TEST PLAN
  I hope nothing got damaged

REPOSITORY
  R39 KTextEditor

REVISION DETAIL
  https://phabricator.kde.org/D21007

AFFECTED FILES
  src/dialogs/kateconfigpage.cpp
  src/dialogs/kateconfigpage.h
  src/dialogs/katedialogs.cpp

To: loh.tar, #ktexteditor
Cc: kwrite-devel, kde-frameworks-devel, #ktexteditor, domson, michaelh, ngraham, bruns, demsking, cullmann, sars, dhaumann
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