Re-instating the DARK theme.

Change-Id: Ic499b4991e41747cc9472838397e5e57cd4ad089
diff --git a/web/gui/src/main/webapp/index.html b/web/gui/src/main/webapp/index.html
index f162ed1..5a903af 100644
--- a/web/gui/src/main/webapp/index.html
+++ b/web/gui/src/main/webapp/index.html
@@ -227,7 +227,6 @@
     <link rel="stylesheet" href="app/view/flow/flow.css">
     <link rel="stylesheet" href="app/view/flow/flow-theme.css">
     <link rel="stylesheet" href="app/view/port/port.css">
-    <link rel="stylesheet" href="app/view/port/port-theme.css">
     <link rel="stylesheet" href="app/view/group/group.css">
     <link rel="stylesheet" href="app/view/group/group-theme.css">
     <link rel="stylesheet" href="app/view/meter/meter.css">
@@ -240,9 +239,9 @@
     <link rel="stylesheet" href="app/view/app/app.css">
     <link rel="stylesheet" href="app/view/app/app-theme.css">
     <link rel="stylesheet" href="app/view/settings/settings.css">
+    <link rel="stylesheet" href="app/view/settings/settings-theme.css">
     <link rel="stylesheet" href="app/view/cluster/cluster.css">
     <link rel="stylesheet" href="app/view/processor/processor.css">
-    <link rel="stylesheet" href="app/view/processor/processor-theme.css">
     <link rel="stylesheet" href="app/view/tunnel/tunnel.css">
 
     <!-- Contributed stylesheets injected here -->