fix(www): Disable browser shortcuts

The default browser keyboard actions interfere with the keyboard based
interaction with the device. Disable them for the MTDA web interface.

Signed-off-by: Tobias Schaffner <[email protected]>

Author: TobiasSchaffner

mtda/templates/index.html

@@ -109,8 +109,9 @@
     <script src="./assets/keysight.js"></script>
     <script type=text/javascript>
       window.addEventListener("keydown", function(event) {
-        var key = keysight(event).char
-        console.log("#### <KEY> " + key)
+        var key = keysight(event).char;
+        event.preventDefault();
+        console.log("#### <KEY> " + key);
         $.getJSON('./keyboard-input', {input: key}, function(key) {
           // do nothing
         });