Allow + for file names in file wizard
Allow + for file names in file wizard

Since some people want to use e.g. c++ as extension.

Task-number: QTCREATORBUG-11266
Change-Id: I88686d814f49fcbc794c8c3427ee7251b24fa563
Reviewed-by: Erik Verbruggen <5edfe905d082749f2ac3f4e6b42937f39f083771@digia.com>

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