system source, some code improvements

sources/qml/General.qml

@@ -68,7 +68,7 @@ QtObject {
         },
         {
             "label": i18n("Network"),
-            "regexp": "^(netdev|(down|up(?!time)).*)"
+            "regexp": "^(netdev|ssid|(down|up(?!time)).*)"
         },
         {
             "label": i18n("Network request"),
@@ -82,6 +82,10 @@ QtObject {
             "label": i18n("Scripts"),
             "regexp": "^custom.*"
         },
+        {
+            "label": i18n("System"),
+            "regexp": "^(volume|brightness)"
+        },
         {
             "label": i18n("Time"),
             "regexp": ".*time$"