Editor: Utilize Current Line Number background color
Editor: Utilize Current Line Number background color

Task-number: QTCREATORBUG-12170
Change-Id: Ib27962a6f72b903fa2caadc441cd6ef51b5b1810
Reviewed-by: David Schulz <f07954e8cc0c222cd136162588d217f330598215@digia.com>

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