Ties should be easy to enter in "input by duration mode"

Your idea

Currently ties are very easy to enter in the standard input by pitch mode: select duration, press "T" (or click toolbar button). If there is an equally easy way to do it in input by duration mode, I haven't found it, and the (new) Handbook doesn't discuss this.

The basic issue, of course, is that selecting the duration enters the note already, so it seems too late for the "T" command to do that. One "obvious" solution would be for the tie command to act retroactively while in input by duration mode - apply a tie backwards from the just-entered note. But that's actually pretty awkward if you think through the different cases, like what happens if the note you just entered isn't the same pitch as the note before, or what happens when pressing "T" after navigating backwards. Maybe a better answer is that the tie command should work more like the rest command: setting input state for the next note. So the sequence to tie to an eighth note would be T 4.

Other solutions are possible as well, of course.

Also, note that the same applies to the old "rhythm only" mode - see https://github.com/musescore/MuseScore/issues/14777.

Problem to be solved

Entering a tie in "input by duration" mode is inordinately difficult.

Prior art

Since the idea behind this mode is borrowed from Finale, we should consider borrowing their tie behavior too, assuming they have a good solution.

Additional context

No response

Checklist

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