fix vertical spacing GrandStaff

Add an engraver so GrandStaff is spaced like a StaffGroup,
missed in the earlier related commit 36c13cd69

diff --git a/ly/engraver-init.ly b/ly/engraver-init.ly
index ab7dafe48ee3a77b5437236494419f88cb63824b..99d057cedaf5327919ef62affe37b246323fb759 100644 (file)
--- a/ly/engraver-init.ly
+++ b/ly/engraver-init.ly
@@ -312,6 +312,7 @@ contained staves are connected vertically."
   \consists "Span_bar_engraver"
   \consists "Span_arpeggio_engraver"
   \consists "System_start_delimiter_engraver"
+  \consists "Vertical_align_engraver"
   systemStartDelimiter = #'SystemStartBrace
   topLevelAlignment = ##f
   %% explicitly set instrument, so it is not inherited from the parent