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/group/group.css b/web/gui/src/main/webapp/app/view/group/group.css
index 42f1c31..6773aa8 100644
--- a/web/gui/src/main/webapp/app/view/group/group.css
+++ b/web/gui/src/main/webapp/app/view/group/group.css
@@ -23,7 +23,6 @@
 }
 
 #ov-group div.ctrl-btns {
-    width: 240px;
 }
 
 .light #ov-group .current-view use {
diff --git a/web/gui/src/main/webapp/app/view/group/group.html b/web/gui/src/main/webapp/app/view/group/group.html
index b963f46..fbd1f1e 100644
--- a/web/gui/src/main/webapp/app/view/group/group.html
+++ b/web/gui/src/main/webapp/app/view/group/group.html
@@ -30,6 +30,11 @@
             <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="active"
                  icon icon-id="flowTable" icon-size="36"
                  tooltip tt-msg="flowTip"
                  ng-click="nav('flow')"></div>
diff --git a/web/gui/src/main/webapp/app/view/group/group.js b/web/gui/src/main/webapp/app/view/group/group.js
index 2510190..2cb1f0c 100644
--- a/web/gui/src/main/webapp/app/view/group/group.js
+++ b/web/gui/src/main/webapp/app/view/group/group.js
@@ -37,6 +37,7 @@
             fs = _fs_;
             tbs = _tbs_;
             ns = _ns_;
+            $scope.deviceTip = 'Show device table';
             $scope.flowTip = 'Show flow view for this device';
             $scope.portTip = 'Show port view for this device';