QmlProfiler: manage external tracefiles nicely
QmlProfiler: manage external tracefiles nicely

When inspecting a trace from an external project
where the source files are not available
avoid displaying error messages continuously

Change-Id: I4dad291092130b0132a338740a54c506edd67161
Reviewed-by: Kai Koehne <077bc265216106fb22408e62f2d97925ede69d10@nokia.com>

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