Added grid to tables

ubl-settings-usergroups.glade

@@ -319,6 +319,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
                     <property name="can-focus">True</property>
                     <property name="model">UsersList</property>
                     <property name="search-column">0</property>
+                    <property name="enable-grid-lines">both</property>
                     <property name="tooltip-column">5</property>
                     <child internal-child="selection">
                       <object class="GtkTreeSelection"/>
@@ -483,6 +484,7 @@ status</property>
                     <property name="can-focus">True</property>
                     <property name="model">GroupsList</property>
                     <property name="search-column">0</property>
+                    <property name="enable-grid-lines">both</property>
                     <child internal-child="selection">
                       <object class="GtkTreeSelection"/>
                     </child>