ONOS-4359: continued work on theming UI
- topo view: device icon and label re-theming (WIP)

Change-Id: I5ecbc1c5b8a8315bfadfaacf62cfdb0e6d1f5a9c
(cherry picked from commit 92eaf44)
diff --git a/web/gui/src/main/webapp/app/view/topo/topo.css b/web/gui/src/main/webapp/app/view/topo/topo.css
index 7b2fb98..0f016b6 100644
--- a/web/gui/src/main/webapp/app/view/topo/topo.css
+++ b/web/gui/src/main/webapp/app/view/topo/topo.css
@@ -179,6 +179,7 @@
 
 #ov-topo svg .node {
     cursor: pointer;
+    fill-rule: evenodd;
 }
 
 #ov-topo svg .node text {