Description of the Issue

The heart of the issue lies in the way the menu item IDS interact with the EncodingMapper. IE a constant is subtracted from the ID and used as an index into the encoding map

However with the recent removal of a number of unused character encodings (60f1137), causes this to breakdown. the command IDs remain the same, however the indexes in the Encoding map have changed. This means that any encoding with a command id greater than the first deleted encoding, no longer behaves as expected.