Added improvements for empty database

lang/en.php

@@ -88,6 +88,7 @@ $lang = array(
     'lang_location_name' => 'Location name',
     'lang_location_parent' => 'Parent',
     'lang_sublocation_add' => 'Add Sub-location',
+    'lang_location_none' => 'There are no locations defined',
 
     'lang_locationsubnet' => 'Location/Subnet',
     'lang_locationsubnet_edit' => 'Edit Location/Subnet',
@@ -96,6 +97,7 @@ $lang = array(
     'lang_node_del' => 'Delete node',
     'lang_node_edit' => 'Modify node',
     'lang_node_info' => 'Node info',
+    'lang_node_none' => 'There are no nodes defined',
     'lang_dns1' => 'DNS name',
     'lang_dns2' => 'DNS Alias',
     'lang_ip' => 'IP Address',
@@ -128,6 +130,7 @@ $lang = array(
     'lang_subnet_dhcpstart' => 'DHCP Start',
     'lang_subnet_dhcpend' => 'DHCP End',
     'lang_subnet_ntp_server' => 'NTP Server',
+    'lang_subnet_none' => 'There are no subnets defined',
 
     'lang_subnetlocation' => 'Subnet/Location',
     'lang_subnetlocation_edit' => 'Edit Subnet/Location',
@@ -144,6 +147,7 @@ $lang = array(
     'lang_zone_add' => 'Add zone',
     'lang_zone_del' => 'Delete zone',
     'lang_zone_edit' => 'Mofidy zone',
+    'lang_zone_none' => 'There are no zones defined',
 
     'lang_vlan_add' => 'Add VLAN',
     'lang_vlan_del' => 'Delete VLAN',
@@ -152,6 +156,7 @@ $lang = array(
     'lang_vlan_info' => 'VLAN info',
     'lang_vlan_new' => 'VLAN info',
     'lang_vlan_name' => 'VLAN name',
+    'lang_vlan_none' => 'There are no VLANs defined',
     'lang_user_language' => 'Language',
 
     'lang_vlansubnet' => 'VLAN/Subnet',