vm: use fork/close/exec for calling editor (#358)
vm: use fork/close/exec for calling editor (#358)

To make sure that path is properly passed (no shell escapes etc).

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