First part of migrating Topo2 to GUI2

Change-Id: I316dd34cba161688e01dfb7b340bff5f2c3c57d4
diff --git a/web/gui2/src/main/webapp/app/view/topology/panel/details/details.theme.css b/web/gui2/src/main/webapp/app/view/topology/panel/details/details.theme.css
new file mode 100644
index 0000000..7ad72dd
--- /dev/null
+++ b/web/gui2/src/main/webapp/app/view/topology/panel/details/details.theme.css
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/* --- Topo Details Panel Theme --- */
+
+#topo2-p-detail svg {
+    background: none;
+}
+
+#topo2-p-detail .header svg .glyph {
+    fill: #c0242b;
+}
+
+.dark #topo2-p-detail .header svg .glyph {
+    fill: #91292f;
+}
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