Only save settings that has been changed

src/transcoder/transcoderoptionsvorbis.cpp

@@ -63,6 +63,8 @@ void TranscoderOptionsVorbis::Load() {
   ui_->min_bitrate_slider->setValue(min_bitrate);
   ui_->bitrate_slider->setValue(bitrate);
 
+  s.endGroup();
+
 }
 
 void TranscoderOptionsVorbis::Save() {
@@ -85,4 +87,6 @@ void TranscoderOptionsVorbis::Save() {
   s.setValue("min-bitrate", min_bitrate);
   s.setValue("max-bitrate", max_bitrate);
 
+  s.endGroup();
+
 }