luci-app-banip: various optimizations

luci-app-banip: various optimizations

* add various translation improvements based on the work of "stokito"
* use the new logreadbox component for the firewall log as well
* removed obsolete standard Save/Save & Apply buttons in the footer,
   use only the improved/customized "Reload" and "Restart" buttons
* improved the error handling in the try/catch blocks

Signed-off-by: Dirk Brenken dev@brenken.org
Signed-off-by: Dirk Brenken <dev@brenken.org>