Option for enharmonic the key signature in the format->tranpose and/or style dialogue for transposing intruments

From time to time we get requests to change the the present key signature from sharp to flat vice versa - generally for instruments of the section woodwinds. AFAIK the easiest way at time is to select it inside the instrument/part properties. Maybe such a option would be also make sense in the dialogue under tools-Transpose... and/or somewhere in the style dialogue?