D21640: kcm_fonts: Fix tracking of configuration changes

[Fabian Vogt]

fvogt created this revision.
fvogt added reviewers: Plasma, bshah.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
fvogt requested review of this revision.

REVISION SUMMARY
  Sometimes, kcm_fonts wrote garbage into fonts.conf. This was a result of not
  initializing variables properly. In addition, toggling the exclude range
  checkbox did not enable the Apply button. That's fixed as well now.

TEST PLAN
  Did almost every possible antialiasing settings configuration,
  fonts.conf looked as expected.

REPOSITORY
  R119 Plasma Desktop

BRANCH
  Plasma/5.16

REVISION DETAIL
  https://phabricator.kde.org/D21640

AFFECTED FILES
  kcms/fonts/fonts.cpp
  kcms/fonts/fonts.h

To: fvogt, #plasma, bshah
Cc: plasma-devel, LeGast00n, ericadams, jraleigh, GB_2, ragreen, Pitel, ZrenBot, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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