D15815: Remove expensive blocking call on plasmashell startup

[David Edmundson]

davidedmundson created this revision.
davidedmundson added a reviewer: Plasma.
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REVISION SUMMARY
  QDBusInterface is a blocking call that calls introspect. We don't need
  to introspect.
  
  As this is called on startup this call starts kuiserver, which means
  plasma is blocked whilst a whole process spawns, this is a lot worse
  than just a regular, ~100ms on my system
  
  Also using the generated versions is generally neater to read.

TEST PLAN
  Restarted plasmashell
  Copied a file
  Still had a spinny wheel
  Q_DBUS_BLOCKING_CALL_MAIN_THREAD_WARNING_MS=0 doesn't list kuiserver

REPOSITORY
  R120 Plasma Workspace

BRANCH
  kuiserver_startup

REVISION DETAIL
  https://phabricator.kde.org/D15815

AFFECTED FILES
  dataengines/applicationjobs/CMakeLists.txt
  dataengines/applicationjobs/kuiserverengine.cpp

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