Tie between enharmonic notes

R.2d3b0b9 - Windows xp
Sometimes, in printed music, you can see enharmonic notes (e.g. G# and Ab, or F and E#) tied. Sometimes even whole chords.

I think it would be interesting to be able to tie these notes by simply using "+".

Thank you.
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P.S.1 Using slurs doesn't have the same visual result (because they're anchored to the stem ends, not the notes), and whole chords can't be tied at all. I know there are workarounds, but they don't work very well.

P.S.2 In the example below, selecting the F# in bar 1 and pressing "+" deletes the following Gb and puts another F# instead, an then it ties them.