QmlProfiler: Improve readability of time labels
QmlProfiler: Improve readability of time labels

Previously there would sometimes be a long line of equal time labels
if you selected a small range from the middle of a long trace. This
patch increases the accuracy of the labels based on selected range,
not on start time.

Task-number: QTCREATORBUG-10865

Change-Id: I482da242c5e9f0117611f100888e80e23ad91b4c
Reviewed-by: Kai Koehne <077bc265216106fb22408e62f2d97925ede69d10@digia.com>

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