ONOS-3738: implemented F1..F5 key bindings to topology overlay selection.
- added size() function to radio button sets
- removed noisy warning (panel resize when contents not defined)

Change-Id: Id39cffe5c6c9f608b9d9af672b1535610a97f0fc
diff --git a/web/gui/src/main/webapp/app/view/topo/topo.js b/web/gui/src/main/webapp/app/view/topo/topo.js
index 3564eb3..ace9a0e 100644
--- a/web/gui/src/main/webapp/app/view/topo/topo.js
+++ b/web/gui/src/main/webapp/app/view/topo/topo.js
@@ -65,6 +65,13 @@
 
             E: [equalizeMasters, 'Equalize mastership roles'],
 
+            // topology overlay selections
+            F1: function () { ttbs.fnkey(0); },
+            F2: function () { ttbs.fnkey(1); },
+            F3: function () { ttbs.fnkey(2); },
+            F4: function () { ttbs.fnkey(3); },
+            F5: function () { ttbs.fnkey(4); },
+
             esc: handleEscape,
 
             _keyListener: ttbs.keyListener,