Reverted old flashblock fix because it stops Qt5 apps from creating windows, because Qt5 embeds every window.
Reverted old flashblock fix because it stops Qt5 apps from creating
windows, because Qt5 embeds every window.

bedna-KU/icewm,dicej/icewm,dicej/icewm,dicej/icewm,jinn-alt/icewm,bedna-KU/icewm,jinn-alt/icewm,dicej/icewm,bedna-KU/icewm,jinn-alt/icewm