Add "Same Accidental" to right-click Select > More options
Pleasing consider adding a selection option like "Same Accidental" to the right-click "Select > More" options. Currently, there is no way to differentiate notes base on accidental type (sharp, double-sharp, flat or double-flat). There are numerous circumstances where this may be desirable such as wanting to change the enharmonic spelling of specific accidentals on mass.
With such a feature, the user would select an accidental note, such as a double flat, and then select "Same Accidental" in the More options dialogue; the result, every note with a double-flat would be highlighted. This would apply for all accidental types (sharp, double-sharps, flat and double-flat) and natural notes, as well. If the user selected a natural note and then "Same Accidental" just natural notes would be selected.