Add lyrics extender lines by pressing <space> multiple times (cf. Sibelius)

Your idea

When entering lyrics, add an automatic lyric extender line if the user presses multiple times. This should provide a lyric extender for tied notes or melismata for monosyllabic words or final syllables, as per the guidelines in Behind Bars. (This functionality exists in Sibelius.)

Problem to be solved

It’s mostly a UX/UI thing, as the user can press _ to get a lyric extender line; however, I believe that entering text using is more intuitive.

Prior art

Sibelius applies automatic lyric extender lines when pressing the key multiple times

Additional context

No response

Checklist

• This request follows the guidelines for reporting issues
• I have verified that this feature request has not been logged before, by searching the issue tracker for similar requests

Start by locating the desktop lyric-entry UI and its existing underscore-based lyric extender behavior. Compare the requested repeated-space interaction with the Sibelius behavior described in the issue, including tied notes, melismata, and final syllables. Done means repeated spaces create the requested extender without disrupting ordinary lyric entry; no file or test is named in the issue.