QmlProfiler: Allow ranges starting at the exact same time
QmlProfiler: Allow ranges starting at the exact same time

Previously, SortedTimelineModel could be confused by ranges starting at
the exact same time if they were inserted in the wrong order. With this
change the nesting calculation keeps track of that.

Change-Id: Id296a54eed7e1ab421e94a296ec4e30adce185f2
Reviewed-by: Kai Koehne <077bc265216106fb22408e62f2d97925ede69d10@digia.com>

kuba1/qtcreator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,maui-packages/qt-creator,amyvmiwei/qt-creator,maui-packages/qt-creator,danimo/qt-creator,danimo/qt-creator,Distrotech/qtcreator,Distrotech/qtcreator,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,danimo/qt-creator,amyvmiwei/qt-creator,xianian/qt-creator,danimo/qt-creator,AltarBeastiful/qt-creator,farseerri/git_code,danimo/qt-creator,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,Distrotech/qtcreator,maui-packages/qt-creator,maui-packages/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,kuba1/qtcreator,danimo/qt-creator,farseerri/git_code,Distrotech/qtcreator,amyvmiwei/qt-creator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,maui-packages/qt-creator,amyvmiwei/qt-creator,xianian/qt-creator,amyvmiwei/qt-creator,amyvmiwei/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,farseerri/git_code,kuba1/qtcreator,Distrotech/qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,AltarBeastiful/qt-creator,farseerri/git_code,xianian/qt-creator,danimo/qt-creator,farseerri/git_code,kuba1/qtcreator,Distrotech/qtcreator,xianian/qt-creator,kuba1/qtcreator,Distrotech/qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,farseerri/git_code,martyone/sailfish-qtcreator,maui-packages/qt-creator,kuba1/qtcreator,xianian/qt-creator,farseerri/git_code,kuba1/qtcreator,martyone/sailfish-qtcreator,farseerri/git_code,xianian/qt-creator,danimo/qt-creator,amyvmiwei/qt-creator,maui-packages/qt-creator