D9047: kglobalacceld: Avoid loading an icon loader for no reason

[David Edmundson]

davidedmundson created this revision.
Restricted Application added a project: Frameworks.
Restricted Application added a subscriber: Frameworks.

REVISION SUMMARY
  We know this is a QGuiApplication app, so we know it doesn't have any
  widgets we also know it doesn't use QtQuick anywhere.
  
  Therefore it won't have any windows and setting a default window icon is
  pointless. 
  This has a surprisingly big overhead as it instantiates the KDE icon theme
  engine. Saves near 5% of startup time.

TEST PLAN
  Compiles

REPOSITORY
  R268 KGlobalAccel

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D9047

AFFECTED FILES
  src/runtime/main.cpp

To: davidedmundson
Cc: #frameworks
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