Revert "BT: Fixed crash on Mac caused by erroneous handling of native focus events."
Revert "BT: Fixed crash on Mac caused by erroneous handling of native focus events."

This reverts commit 7314c07a3e443b1d5349b419a03db8d41ca43f7e.

As reported by Eike, this patch caused several problems for Qt Creator.
Potentially it may cause problems for other (external) applications as well.
An alternative fix (scheduled for 4.5.x) needs to be found for tasks
254456 and 254460.

Reviewed-by: Richard Moe Gustavsen

RLovelett/qt,KDE/qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,RLovelett/qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,radekp/qt,igor-sfdc/qt-wk,RLovelett/qt,KDE/qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,KDE/qt,RLovelett/qt,RLovelett/qt,radekp/qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,KDE/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,radekp/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,RLovelett/qt,igor-sfdc/qt-wk,RLovelett/qt,radekp/qt,pruiz/wkhtmltopdf-qt,radekp/qt,radekp/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,KDE/qt,RLovelett/qt,radekp/qt,radekp/qt,KDE/qt,radekp/qt,RLovelett/qt,KDE/qt,KDE/qt,radekp/qt,pruiz/wkhtmltopdf-qt