too much space after time signature if first chord has accidental

Windows 7, GIT commit: 65899b5

1) load attached score
2) compare space between time signature and first chord between measure 2 & 3 (or 4 & 5)

Result: measures 3 & 4 - which have accidentals on first chord - have more space between accidental and first chord than measures 1, 2 & 5 do. The actual difference is fairly small, but I think it looks larger because I expect there to be *less* space before the accidental, not more. The image below is a slightly different example, but you get the idea:

Elaine Gould's "Behind Bars" makes a recommendation on p. 42 that works for me. She shows minimum distance from key signature to note being 2sp, but barline to accidental being 1sp. Whereas barline to accidental could be 0.5sp (shown on p. 43). I'm not saying we should blindly copy her specific numbers, but the basic idea makes sense - less space from time to accidental than to note, just as we do for barlines.

These could be made style parameters like other similar settings, of course - "time signature to note distance" and "time signature to accidental distance".