ONOS-3265: Added navigation button / logic for devices/flows/ports/groups views.
 - just need to create a "devices table" icon.

Change-Id: I3efca7dbb1ebb718416b583b71639763b9f32886
diff --git a/web/gui/src/main/webapp/app/view/flow/flow.html b/web/gui/src/main/webapp/app/view/flow/flow.html
index 5fce98c..df95439 100644
--- a/web/gui/src/main/webapp/app/view/flow/flow.html
+++ b/web/gui/src/main/webapp/app/view/flow/flow.html
@@ -13,6 +13,11 @@
 
             <div class="separator"></div>
 
+            <div class="active"
+                 icon icon-id="query" icon-size="36"
+                 tooltip tt-msg="deviceTip"
+                 ng-click="nav('device')"></div>
+
             <div class="current-view"
                  icon icon-id="flowTable" icon-size="36"></div>