Fix context registration for project tree.
Fix context registration for project tree.

Broke with IContext refactoring.

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