Removing accels remove more than expected

[Breush]

In the following example, "accel2" should still be active, but is not:

var label = new photonui.Label({text: ""});
photonui.domInsert(label, "demo");

var accel = new photonui.AccelManager();
accel.addAccel("accel1", "ctrl + a", function() {
    label.text += "1\n";
});
accel.addAccel("accel2", "ctrl + a", function() {
    label.text += "2\n";
});

accel.removeAccel("accel1");