allow GraphDisplay Line to be themed

Docs/Changelog_sm-ssc.txt

@@ -13,6 +13,10 @@ _____________________________________________________________________________
 sm-ssc v1.0 Release Candidate 2 | 201008xx
 --------------------------------------------------------------------------------
 
+20100817
+--------
+* [GraphDisplay] Allow Line to be themed via metrics.
+
 20100815
 --------
 * [GameCommand] Remove pushscreen command

src/GraphDisplay.cpp

@@ -232,6 +232,8 @@ void GraphDisplay::Load( RString sMetricsGroup )
 	this->AddChild( m_pGraphBody );
 
 	m_pGraphLine = new GraphLine;
+	m_pGraphLine->SetName("Line");
+	ActorUtil::LoadAllCommands( m_pGraphLine, sMetricsGroup );
 	this->AddChild( m_pGraphLine );
 
 	m_sprSongBoundary.Load( THEME->GetPathG(sMetricsGroup,"SongBoundary") );