ui: remove server-side user templates

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
one check for admin rights for create button

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
site

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
device

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
system linked to site

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>