Debugger: Allow pure qml debugging if no C++ debugger is configured
Debugger: Allow pure qml debugging if no C++ debugger is configured

Don't complain e.g. about a missing cdb debugger if the user doesn't
want to debug C++ anyway.

Task-number: QTCREATORBUG-2376
Reviewed-by: hjk

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