Timezone correction

src/app/courses/groups/group-list/group-list.component.html

...courses/projects/project-list/project-list.component.html

src/app/courses/roles/role-list/role-list.component.html

src/app/secrets/secret-list/secret-list.component.html

...shared/submissions-table/submissions-table.component.html

...ssions/submission-detail/submission-detail.component.html

...missions/submission-stats/submission-stats.component.html

src/app/users/user-list/user-list.component.html

src/app/workers/worker-list/worker-list.component.html