dokan: more tweaks for MSOffice compatability
dokan: more tweaks for MSOffice compatability

PyFilesystem/pyfilesystem,flying-circus/pyfilesystem,piranna/pyfilesystem,zopyx/pyfilesystem,pmitros/pyfs,pombreda/pyfilesystem,pmitros/pyfs,rivenz/pyfilesystem,Konubinix/pyfilesystem