Fix bootstart of input field

It wasn't working properly anymore because it expected to be triggered
by the "load". But we now register that event listener long after the
"load" event has already fired.

app/ui.js

@@ -98,6 +98,9 @@ const UI = {
         document.getElementById("noVNC_status")
             .addEventListener('click', UI.hideStatus);
 
+        // Bootstrap fallback input handler
+        UI.keyboardinputReset();
+
         UI.openControlbar();
 
         // Show the connect panel on first load unless autoconnecting
@@ -311,8 +314,6 @@ const UI = {
             .addEventListener('touchend', UI.controlbarHandleMouseUp);
         document.getElementById("noVNC_control_bar_handle")
             .addEventListener('touchmove', UI.dragControlbarHandle);
-
-        window.addEventListener('load', UI.keyboardinputReset);
     },
 
     addExtraKeysHandlers: function() {