Instantiate QApplication before KCrash/KCatalog

Summary: There are some warnings at runtime because KCrash and KCatalog (through i18n calls) are instantiated before the QApp itself is.

Reviewers: Baloo, bruns, poboiko, mlaurent

Reviewed By: mlaurent

Subscribers: kde-frameworks-devel, Baloo

Tags: Frameworks, Baloo

Differential Revision: https://phabricator.kde.org/D18424