Do not accumulate connections for updating external file warning
Do not accumulate connections for updating external file warning

The project explorer was accumulating connects to editors' changed
signals (for editors on "external" files).

Change-Id: Ia961a76ca9b67429a682973bc68acd483d4cd127
Reviewed-by: Daniel Teske <d8a411aec9a206efedb4d45b75fe8d13f1e2b628@digia.com>

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