Fix SVGSwitch value scaling, add confirmation for clearing the patch

with File > New

src/app/RackWidget.cpp

@@ -41,8 +41,10 @@ void RackWidget::clear() {
 }
 
 void RackWidget::reset() {
-	clear();
-	loadPatch(assetLocal("template.vcv"));
+	if (osdialog_message(OSDIALOG_INFO, OSDIALOG_OK_CANCEL, "Clear your patch and start over?")) {
+		clear();
+		loadPatch(assetLocal("template.vcv"));
+	}
 }
 
 void RackWidget::openDialog() {

src/app/SVGSwitch.cpp

@@ -24,7 +24,8 @@ void SVGSwitch::step() {
 
 void SVGSwitch::onChange(EventChange &e) {
 	assert(frames.size() > 0);
-	int index = clampi((int) roundf(value), 0, frames.size() - 1);
+	float valueScaled = rescalef(value, minValue, maxValue, 0, frames.size() - 1);
+	int index = clampi((int) roundf(valueScaled), 0, frames.size() - 1);
 	sw->setSVG(frames[index]);
 	dirty = true;
 	Switch::onChange(e);