dispvm: start gui-daemon in "invisible mode" when preparing DispVM
dispvm: start gui-daemon in "invisible mode" when preparing DispVM

QubesOS/qubes-core-admin,QubesOS/qubes-core-admin,marmarek/qubes-core-admin,woju/qubes-core-admin,marmarek/qubes-core-admin,woju/qubes-core-admin,woju/qubes-core-admin,woju/qubes-core-admin,marmarek/qubes-core-admin,QubesOS/qubes-core-admin