C++: fix semantic highlighting when multiple editors are visible.
C++: fix semantic highlighting when multiple editors are visible.

Update an editor when it is visible, not only when it is the active
editor.

Change-Id: I972d7185e466355dba62f2f59144cfaad5f37778
Reviewed-by: David Schulz <f07954e8cc0c222cd136162588d217f330598215@digia.com>

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