Not all characters allowed in labels

[philippecade]

We stumbled upon a small issue when changing block labels: not all characters are allowed in labels, namely accentuated characters are rejected.

The culprit is the BlockLabelTextField class that filters characters and key codes, especially the processKeyBinding method.

We're not quite sure on the reason why input shall be restricted to the given list of characters, can this code be removed completely? The isNumber part would have to be kept, but we feel like everything else could just be delegated to the super call.

[mikaelhg]

I'm unaware of the reason. If you suspect there might be a more subtle reason behind this, you can try contacting the original authors.