Bug 31435: Tie 'Configure' to table_settings

Bug 31435: Tie 'Configure' to table_settings

This patch adds a check for table_settings to prevent the display of
'Configure this table' when table settings are not passed to the
datatable wrapper.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Suggested test plan:
* Without patch:
* Go to Administration > SMTP servers
* Verify the configure button shows, but doesn't work
* Apply patch
* Reload the SMTP servers page
* The configure button will no longer show

Signed-off-by: Joonas Kylmälä <joonas.kylmala@iki.fi>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>