* Various changes for reworked mute icon handling in some classes

- mute icon disabled for moviebrowser, upnpbrowser, pictureviewer
- extra handling for audioplayer

src/gui/pictureviewer.cpp

@@ -44,6 +44,7 @@
 #include <driver/fontrenderer.h>
 #include <driver/rcinput.h>
 
+#include <gui/audiomute.h>
 #include <gui/nfs.h>
 
 #include <gui/widget/buttons.h>
@@ -238,6 +239,8 @@ int CPictureViewerGui::show()
 	if (audioplayer)
 		m_currentTitle = m_audioPlayer->getAudioPlayerM_current();
 
+	CAudioMute::getInstance()->enableMuteIcon(false);
+
 	while (loop)
 	{
 		if (update)
@@ -618,6 +621,8 @@ int CPictureViewerGui::show()
 	}
 	hide();
 
+	CAudioMute::getInstance()->enableMuteIcon(true);
+
 	return(res);
 }