ONOS-3265: Re-used device glyph for deviceTable icon.

Change-Id: I5c22c6e3229780dae9ced370c0d27fcd516a2f16
diff --git a/web/gui/src/main/webapp/app/fw/svg/icon.js b/web/gui/src/main/webapp/app/fw/svg/icon.js
index 1253636..cc26360 100644
--- a/web/gui/src/main/webapp/app/fw/svg/icon.js
+++ b/web/gui/src/main/webapp/app/fw/svg/icon.js
@@ -51,6 +51,7 @@
 
         devIcon_SWITCH: 'switch',
         devIcon_ROADM: 'roadm',
+        deviceTable: 'switch',
         flowTable: 'flowTable',
         portTable: 'portTable',
         groupTable: 'groupTable',