QmlEngine: Fix crash when trying to connect
QmlEngine: Fix crash when trying to connect

Since we directly called beginConnection in connectionStartupFailed
we got a stack overflow over time. Instead, only try to connect
every 3 seconds.

Also remove special logic for mixed debugging: They should behave
the same (except maybe where you're breaking inside QQmlDebugServer,
but that's a corner case).

Change-Id: Idf2f55e3d905a01065c123c708b50dbb88388d1f
Reviewed-by: Aurindam Jana <7c408417cef34be80f3feca6b61197eafaefe98d@nokia.com>

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