GtkUtils - Changed 'while' into 'for' loops when looking for given parent. This helps prevent one 'if' test.
GtkUtils - Changed 'while' into 'for' loops when looking for given parent. This helps prevent one 'if' test.

KDE/oxygen-gtk,KDE/oxygen-gtk,blue-shell/carbon-gtk,blueshell-next/carbon-gtk,blueshell-next/carbon-gtk,blue-shell/carbon-gtk