GUI -- Fixed topo toolbar button synchronization with keystroke commands.
- Added toggleNoCb to the toggle button widget.
- Added _keyListener property to keyBindings structure, and the invocation of it from keyIn().
- Added keyListener to topoToolbar to synchronize button state.

Change-Id: Iffb1dc5d38f2d9010f5e246cfb81a6b3db30d4af
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 5156fb0..bfcb15b 100644
--- a/web/gui/src/main/webapp/app/view/topo/topo.js
+++ b/web/gui/src/main/webapp/app/view/topo/topo.js
@@ -69,6 +69,8 @@
 
             esc: handleEscape,
 
+            _keyListener: ttbs.keyListener,
+
             _helpFormat: [
                 ['O', 'I', 'D', '-', 'H', 'M', 'P', 'B' ],
                 ['X', 'Z', 'L', 'U', 'R' ],