WelcomePage: adding hasSearchBar property to IWelcomePage
WelcomePage: adding hasSearchBar property to IWelcomePage

This property decides if the searchBar in the tool bar is shown or not.

Change-Id: Ic00da70a6427dff71b49f4341003d31b43338fed
Reviewed-on: http://codereview.qt-project.org/5705
Reviewed-by: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: hjk <6fac1c92f5b9c7890a04d7f8a9d8912d16355eac@ovi.com>

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