D8399: Fix colours not updating in systemsettings

[David Edmundson]

davidedmundson created this revision.
davidedmundson added a reviewer: Plasma.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.

REVISION SUMMARY
  (after a log of looking, it turns it's out not a bug in the QQC desktop
  style)
  
  KSharedConfig::openConfig() opens the config based on the app name.
  
  The app name comes from the exec name, or
  KAboutData::setApplicationData.
  setApplicationData only works on an existing qApp.
  
  This means the QPT loaded in the QApp uses the wrong config.
  The effect is minimal because most stuff is in kdeglobals, but it means
  the KSharedConfigPtr is not shared with the one used elsewhere in the
  app. This is wasteful, but also means the QPT calling
  reparseConfiguration doesn't take effect, leading to colours not being
  dynamically updated

REPOSITORY
  R124 System Settings

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D8399

AFFECTED FILES
  app/main.cpp

To: davidedmundson, #plasma
Cc: plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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