Each display needs a stack and a stack box to contain windows. Fixes bug 10161525. Change-Id: Ic617cdf5a082ae68f0589e826ecbb37d8fba52ac
Each display needs a stack and a stack box to contain windows. Fixes bug 10161525. Change-Id: Ic617cdf5a082ae68f0589e826ecbb37d8fba52ac