GUI: sprefs_audio hide lastfm when not checked

modules/gui/qt4/components/simple_preferences.cpp

@@ -347,10 +347,10 @@ SPrefsPanel::SPrefsPanel( intf_thread_t *_p_intf, QWidget *_parent,
                 else
                     ui.lastfm->setChecked( false );
 
-                ui.lastfm_zone->setEnabled( ui.lastfm->isChecked() );
+                ui.lastfm_zone->setVisible( ui.lastfm->isChecked() );
 
                 CONNECT( ui.lastfm, toggled( bool ),
-                         ui.lastfm_zone, setEnabled( bool ) );
+                         ui.lastfm_zone, setVisible( bool ) );
                 CONNECT( ui.lastfm, stateChanged( int ),
                          this, lastfm_Changed( int ) );
             }

modules/gui/qt4/ui/sprefs_audio.ui

@@ -11,6 +11,12 @@
     <height>619</height>
    </rect>
   </property>
+  <property name="sizePolicy">
+   <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
   <property name="windowTitle">
    <string>Form</string>
   </property>