Merge pull request #55 from ksk-uchi/BUG-912-remove-group_id

Bug 912 remove group
BUG-912 remove lines from nav.html relate group_id
Merge pull request #56 from ksk-uchi/BUG-912-remove-group_id

BUG-912 remove lines from nav.html relate group_id
Merge branch 'master' into BUG-910-remove-preview-get-api