Ties to enharmonics don't display accidentals

1. Open new file.
2. Key of F# major
3. Put an A# whole note in one measure and a Bb in the next measure.
4. Tie them together so they play as a double whole note.

The "b" will dissapear off of the Bb. There plenty of reasons, especially in late Romantic music, to tie notes to their enharmonics. The workaround available is a bad one--placing a "b" in text box and manually inserting it into the score. Simply not feasible for large scores and cleaning parts.