WelcomeScreen: Fix compilation with namespaced Qt.
WelcomeScreen: Fix compilation with namespaced Qt.

Change-Id: Ia5695feaebba959f84ab4d2707a2d5f1667ad3c7
Reviewed-on: http://codereview.qt.nokia.com/1960
Reviewed-by: Christian Kandeler <3aa99dcdd3f0cac61fb81c2a11771c0cc2497607@nokia.com>

xianian/qt-creator,richardmg/qtcreator,bakaiadam/collaborative_qt_creator,bakaiadam/collaborative_qt_creator,danimo/qt-creator,omniacreator/qtcreator,amyvmiwei/qt-creator,syntheticpp/qt-creator,dmik/qt-creator-os2,darksylinc/qt-creator,omniacreator/qtcreator,syntheticpp/qt-creator,jonnor/qt-creator,Distrotech/qtcreator,AltarBeastiful/qt-creator,KDAB/KDAB-Creator,maui-packages/qt-creator,colede/qtcreator,amyvmiwei/qt-creator,darksylinc/qt-creator,KDAB/KDAB-Creator,danimo/qt-creator,farseerri/git_code,kuba1/qtcreator,ostash/qt-creator-i18n-uk,maui-packages/qt-creator,colede/qtcreator,KDE/android-qt-creator,dmik/qt-creator-os2,amyvmiwei/qt-creator,KDAB/KDAB-Creator,AltarBeastiful/qt-creator,duythanhphan/qt-creator,syntheticpp/qt-creator,maui-packages/qt-creator,darksylinc/qt-creator,KDE/android-qt-creator,KDAB/KDAB-Creator,martyone/sailfish-qtcreator,Distrotech/qtcreator,richardmg/qtcreator,duythanhphan/qt-creator,KDE/android-qt-creator,maui-packages/qt-creator,hdweiss/qt-creator-visualizer,kuba1/qtcreator,syntheticpp/qt-creator,danimo/qt-creator,hdweiss/qt-creator-visualizer,jonnor/qt-creator,danimo/qt-creator,ostash/qt-creator-i18n-uk,KDE/android-qt-creator,malikcjm/qtcreator,amyvmiwei/qt-creator,xianian/qt-creator,xianian/qt-creator,farseerri/git_code,KDE/android-qt-creator,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,colede/qtcreator,ostash/qt-creator-i18n-uk,KDAB/KDAB-Creator,farseerri/git_code,Distrotech/qtcreator,malikcjm/qtcreator,omniacreator/qtcreator,hdweiss/qt-creator-visualizer,kuba1/qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,dmik/qt-creator-os2,malikcjm/qtcreator,kuba1/qtcreator,syntheticpp/qt-creator,Distrotech/qtcreator,AltarBeastiful/qt-creator,darksylinc/qt-creator,amyvmiwei/qt-creator,bakaiadam/collaborative_qt_creator,ostash/qt-creator-i18n-uk,amyvmiwei/qt-creator,azat/qtcreator,omniacreator/qtcreator,colede/qtcreator,duythanhphan/qt-creator,bakaiadam/collaborative_qt_creator,maui-packages/qt-creator,maui-packages/qt-creator,darksylinc/qt-creator,xianian/qt-creator,danimo/qt-creator,danimo/qt-creator,omniacreator/qtcreator,amyvmiwei/qt-creator,farseerri/git_code,martyone/sailfish-qtcreator,malikcjm/qtcreator,azat/qtcreator,Distrotech/qtcreator,colede/qtcreator,farseerri/git_code,dmik/qt-creator-os2,malikcjm/qtcreator,darksylinc/qt-creator,malikcjm/qtcreator,xianian/qt-creator,KDE/android-qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,syntheticpp/qt-creator,richardmg/qtcreator,dmik/qt-creator-os2,hdweiss/qt-creator-visualizer,xianian/qt-creator,hdweiss/qt-creator-visualizer,duythanhphan/qt-creator,kuba1/qtcreator,azat/qtcreator,bakaiadam/collaborative_qt_creator,KDE/android-qt-creator,duythanhphan/qt-creator,jonnor/qt-creator,jonnor/qt-creator,syntheticpp/qt-creator,richardmg/qtcreator,omniacreator/qtcreator,duythanhphan/qt-creator,kuba1/qtcreator,azat/qtcreator,colede/qtcreator,ostash/qt-creator-i18n-uk,Distrotech/qtcreator,danimo/qt-creator,KDAB/KDAB-Creator,darksylinc/qt-creator,kuba1/qtcreator,richardmg/qtcreator,maui-packages/qt-creator,azat/qtcreator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,farseerri/git_code,colede/qtcreator,richardmg/qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,darksylinc/qt-creator,ostash/qt-creator-i18n-uk,bakaiadam/collaborative_qt_creator,KDE/android-qt-creator,ostash/qt-creator-i18n-uk,kuba1/qtcreator,danimo/qt-creator,azat/qtcreator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,kuba1/qtcreator,hdweiss/qt-creator-visualizer,omniacreator/qtcreator,farseerri/git_code,xianian/qt-creator,richardmg/qtcreator,farseerri/git_code,jonnor/qt-creator,martyone/sailfish-qtcreator,bakaiadam/collaborative_qt_creator,duythanhphan/qt-creator,malikcjm/qtcreator,Distrotech/qtcreator,jonnor/qt-creator,dmik/qt-creator-os2,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,dmik/qt-creator-os2