Editor: Use native separators in the search/directory input
Editor: Use native separators in the search/directory input

This is called for example with the "Find in This Directory..."
action in the project tree.

Change-Id: If4c523e9f416b241b4ac7057d2dd11821af2c990
Reviewed-by: Eike Ziller <c142da16c73a95a82d35191bcc55b22835617128@digia.com>

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