[lipstick] Reparent transient windows. Contributes to JB#27230
[lipstick] Reparent transient windows. Contributes to JB#27230

giucam/lipstick,pvuorela/lipstick,sletta/lipstick,sletta/lipstick,pvuorela/lipstick,giucam/lipstick,pvuorela/lipstick,sletta/lipstick,giucam/lipstick