Improved check for "scope token"
Improved check for "scope token"

For example, don't keep triggering scope completion on bunch of colons.

Done with Roberto Raggi.

bakaiadam/collaborative_qt_creator,ostash/qt-creator-i18n-uk,malikcjm/qtcreator,colede/qtcreator,dmik/qt-creator-os2,danimo/qt-creator,malikcjm/qtcreator,colede/qtcreator,syntheticpp/qt-creator,xianian/qt-creator,enricoros/k-qt-creator-inspector,darksylinc/qt-creator,azat/qtcreator,yinyunqiao/qtcreator,renatofilho/QtCreator,xianian/qt-creator,kuba1/qtcreator,kuba1/qtcreator,danimo/qt-creator,KDE/android-qt-creator,KDAB/KDAB-Creator,Distrotech/qtcreator,KDAB/KDAB-Creator,Distrotech/qtcreator,yinyunqiao/qtcreator,xianian/qt-creator,syntheticpp/qt-creator,martyone/sailfish-qtcreator,farseerri/git_code,richardmg/qtcreator,duythanhphan/qt-creator,richardmg/qtcreator,jonnor/qt-creator,danimo/qt-creator,yinyunqiao/qtcreator,amyvmiwei/qt-creator,malikcjm/qtcreator,renatofilho/QtCreator,xianian/qt-creator,bakaiadam/collaborative_qt_creator,ostash/qt-creator-i18n-uk,kuba1/qtcreator,KDAB/KDAB-Creator,richardmg/qtcreator,darksylinc/qt-creator,farseerri/git_code,xianian/qt-creator,KDE/android-qt-creator,AltarBeastiful/qt-creator,pcacjr/qt-creator,KDAB/KDAB-Creator,Distrotech/qtcreator,colede/qtcreator,xianian/qt-creator,farseerri/git_code,duythanhphan/qt-creator,amyvmiwei/qt-creator,azat/qtcreator,sandsmark/qtcreator-minimap,azat/qtcreator,AltarBeastiful/qt-creator,renatofilho/QtCreator,danimo/qt-creator,AltarBeastiful/qt-creator,darksylinc/qt-creator,syntheticpp/qt-creator,amyvmiwei/qt-creator,kuba1/qtcreator,yinyunqiao/qtcreator,Distrotech/qtcreator,renatofilho/QtCreator,danimo/qt-creator,KDE/android-qt-creator,farseerri/git_code,KDE/android-qt-creator,jonnor/qt-creator,pcacjr/qt-creator,dmik/qt-creator-os2,danimo/qt-creator,ostash/qt-creator-i18n-uk,omniacreator/qtcreator,KDE/android-qt-creator,xianian/qt-creator,maui-packages/qt-creator,ostash/qt-creator-i18n-uk,azat/qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,jonnor/qt-creator,Distrotech/qtcreator,omniacreator/qtcreator,pcacjr/qt-creator,darksylinc/qt-creator,syntheticpp/qt-creator,KDAB/KDAB-Creator,Distrotech/qtcreator,richardmg/qtcreator,farseerri/git_code,AltarBeastiful/qt-creator,bakaiadam/collaborative_qt_creator,yinyunqiao/qtcreator,malikcjm/qtcreator,amyvmiwei/qt-creator,amyvmiwei/qt-creator,syntheticpp/qt-creator,amyvmiwei/qt-creator,kuba1/qtcreator,darksylinc/qt-creator,danimo/qt-creator,malikcjm/qtcreator,ostash/qt-creator-i18n-uk,maui-packages/qt-creator,bakaiadam/collaborative_qt_creator,duythanhphan/qt-creator,hdweiss/qt-creator-visualizer,renatofilho/QtCreator,omniacreator/qtcreator,hdweiss/qt-creator-visualizer,KDE/android-qt-creator,omniacreator/qtcreator,malikcjm/qtcreator,duythanhphan/qt-creator,sandsmark/qtcreator-minimap,maui-packages/qt-creator,bakaiadam/collaborative_qt_creator,AltarBeastiful/qt-creator,jonnor/qt-creator,martyone/sailfish-qtcreator,dmik/qt-creator-os2,duythanhphan/qt-creator,martyone/sailfish-qtcreator,renatofilho/QtCreator,farseerri/git_code,martyone/sailfish-qtcreator,hdweiss/qt-creator-visualizer,ostash/qt-creator-i18n-uk,syntheticpp/qt-creator,AltarBeastiful/qt-creator,amyvmiwei/qt-creator,enricoros/k-qt-creator-inspector,pcacjr/qt-creator,kuba1/qtcreator,bakaiadam/collaborative_qt_creator,dmik/qt-creator-os2,hdweiss/qt-creator-visualizer,jonnor/qt-creator,azat/qtcreator,kuba1/qtcreator,richardmg/qtcreator,pcacjr/qt-creator,darksylinc/qt-creator,richardmg/qtcreator,enricoros/k-qt-creator-inspector,ostash/qt-creator-i18n-uk,dmik/qt-creator-os2,colede/qtcreator,sandsmark/qtcreator-minimap,AltarBeastiful/qt-creator,pcacjr/qt-creator,enricoros/k-qt-creator-inspector,pcacjr/qt-creator,colede/qtcreator,maui-packages/qt-creator,jonnor/qt-creator,richardmg/qtcreator,azat/qtcreator,dmik/qt-creator-os2,KDE/android-qt-creator,duythanhphan/qt-creator,martyone/sailfish-qtcreator,KDAB/KDAB-Creator,hdweiss/qt-creator-visualizer,enricoros/k-qt-creator-inspector,kuba1/qtcreator,maui-packages/qt-creator,colede/qtcreator,omniacreator/qtcreator,Distrotech/qtcreator,hdweiss/qt-creator-visualizer,yinyunqiao/qtcreator,syntheticpp/qt-creator,farseerri/git_code,dmik/qt-creator-os2,enricoros/k-qt-creator-inspector,AltarBeastiful/qt-creator,sandsmark/qtcreator-minimap,bakaiadam/collaborative_qt_creator,amyvmiwei/qt-creator,maui-packages/qt-creator,darksylinc/qt-creator,maui-packages/qt-creator,omniacreator/qtcreator,kuba1/qtcreator,KDE/android-qt-creator,danimo/qt-creator,xianian/qt-creator,farseerri/git_code,yinyunqiao/qtcreator,colede/qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,darksylinc/qt-creator,malikcjm/qtcreator,enricoros/k-qt-creator-inspector,omniacreator/qtcreator,sandsmark/qtcreator-minimap,martyone/sailfish-qtcreator,sandsmark/qtcreator-minimap,duythanhphan/qt-creator