Switch VCO from PNG to SVG

src/VCO.cpp

@@ -190,9 +190,9 @@ VCOWidget::VCOWidget() {
 	box.size = Vec(15*10, 380);
 
 	{
-		Panel *panel = new LightPanel();
+		SVGPanel *panel = new SVGPanel();
 		panel->box.size = box.size;
-		panel->backgroundImage = Image::load("plugins/Fundamental/res/VCO.png");
+		panel->addBackground(SVG::load("plugins/Fundamental/res/VCO.svg"));
 		addChild(panel);
 	}