QmlJsEditor: hide context pane if last document is closed
QmlJsEditor: hide context pane if last document is closed

Task-number: QTCREATORBUG-3702
Reviewed-by: Christian Kamm

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