Fix black Ties and Slurs for secondVoiceStyle

private_includes/base/basic_format_and_style_settings.ily

@@ -72,6 +72,8 @@ generalLayout = \layout {
     \override Stem.layer = 2
     \override Flag.layer = 2
     \override Beam.layer = 2
+    \override Slur.layer = 2
+    \override Tie.layer = 2
     \override Accidental.layer = 2
   }
 }
@@ -89,6 +91,8 @@ secondVoiceStyle = {
   \override Stem.color = #grey
   \override Flag.color = #grey
   \override Beam.color = #grey
+  \override Slur.color = #grey
+  \override Tie.color = #grey
   \override Accidental.color = #grey
   \override NoteHead.layer = 1
   \override Rest.layer = 1
@@ -96,6 +100,8 @@ secondVoiceStyle = {
   \override Stem.layer = 1
   \override Flag.layer = 1
   \override Beam.layer = 1
+  \override Slur.layer = 1
+  \override Tie.layer = 1
   \override Accidental.layer = 1
 }
 
@@ -106,6 +112,8 @@ firstVoiceStyle = {
   \override Stem.color = #black
   \override Flag.color = #black
   \override Beam.color = #black
+  \override Slur.color = #black
+  \override Tie.color = #black
   \override Accidental.color = #black
 }