Lines to edges of \center-column

[caagr98]

Is there some way to make a center-column draw lines from slightly 
outside the text to the edges of the column (see example)?

In this specific case, I have both English and Japanese names for stuff, 
and without those lines, I think it's a bit unclear exactly what part 
the Japanese refers to.

```
subtitle = \markup \bold \large \line {
  "from"
  \center-column {
    "Legend of Heroes"
    \smaller \smaller \smaller
    "英雄伝説"
  }
  "VI:"
  \center-column {
    "Trails in the Sky"
    \smaller \smaller \smaller
    "空の軌跡"
  }
}
```

column-lines.png
Description: PNG image