Text editor: Disable undo when loading chunks
Text editor: Disable undo when loading chunks

Instead of clearing the stack afterwards.

Reviewed-by: Thorbjorn Lindeijer

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