Reduce size of general debugger settings.
Reduce size of general debugger settings.

Part of a series of commits reducing the (vertical) size of the
preferences dialog.

Task-number: QTCREATORBUG-3172
Change-Id: I649ef392a8fc0fb068cc2f683d58ef324981a1b5
Reviewed-on: http://codereview.qt-project.org/5232
Reviewed-by: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: hjk <6fac1c92f5b9c7890a04d7f8a9d8912d16355eac@ovi.com>

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