[Client][HatoholHostgroupPrivilegeEditDialog] Fix this dialog isn't able
to check and uncheck when "All check" and "All uncheck" buttons are
clicked.
[Client][HatoholPrivilegeEditDialog] Use "self" instead of "this".
[Client][HatoholPrivilegeEditDialog] Restart this dialog when
HatoholHostgroupPrivilegeEditDialog succeeds.
Merge branch 'issue27-5'