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/device/device.html b/web/gui/src/main/webapp/app/view/device/device.html
index 63a04db..c2b9e98 100644
--- a/web/gui/src/main/webapp/app/view/device/device.html
+++ b/web/gui/src/main/webapp/app/view/device/device.html
@@ -9,6 +9,9 @@
                  ng-click="toggleRefresh()"></div>
             <div class="separator"></div>
 
+            <div ng-class="{'current-view': !!selId}"
+                 icon icon-id="query" icon-size="36"></div>
+
             <div ng-class="{active: !!selId}"
                  icon icon-id="flowTable" icon-size="36"
                  tooltip tt-msg="flowTip"