AttentionBar: don't use ShowWithEffect even on Windows.
AttentionBar: don't use ShowWithEffect even on Windows.

The animation is flickering, with the window behind it not updated, not
very nice in 2013.

BenKeyFSI/poedit,c72578/poedit,dwaynebailey/poedit,nawawi/poedit,vslavik/poedit,PKRoma/poedit,BenKeyFSI/poedit,huoxudong125/poedit,BenKeyFSI/poedit,PKRoma/poedit,c72578/poedit,vslavik/poedit,PatidarWeb/poedit,PKRoma/poedit,huoxudong125/poedit,nawawi/poedit,PatidarWeb/poedit,dwaynebailey/poedit,alexhenrie/poedit,babycaseny/poedit,egoitzro/poedit,vslavik/poedit,alexhenrie/poedit,babycaseny/poedit,nawawi/poedit,PKRoma/poedit,BenKeyFSI/poedit,PatidarWeb/poedit,c72578/poedit,egoitzro/poedit,egoitzro/poedit,huoxudong125/poedit,vslavik/poedit,nawawi/poedit,huoxudong125/poedit,BenKeyFSI/poedit,nawawi/poedit,egoitzro/poedit,alexhenrie/poedit,babycaseny/poedit,dwaynebailey/poedit,PKRoma/poedit,alexhenrie/poedit,PatidarWeb/poedit,dwaynebailey/poedit,PatidarWeb/poedit,c72578/poedit,huoxudong125/poedit,babycaseny/poedit,babycaseny/poedit,c72578/poedit,alexhenrie/poedit,dwaynebailey/poedit,vslavik/poedit,egoitzro/poedit