Show utf-8 as utf-8, eg translations in playlistpanel.

also add _("ID") instead of empty label on first label (seems that it's id)

modules/gui/qt4/components/playlist/playlist_item.cpp

@@ -116,7 +116,7 @@ void PLItem::updateColumnHeaders()
     for( uint32_t i_index=1; i_index < COLUMN_END; i_index <<= 1 )
     {
         if( i_showflags & i_index )
-            item_col_strings.append( psz_column_title( i_index ) );
+            item_col_strings.append( qfu( psz_column_title( i_index ) ) );
     }
 }
 
@@ -187,7 +187,7 @@ void PLItem::update( playlist_item_t *p_item, bool iscurrent )
         if( parentItem->i_showflags & i_index )
         {
             char *psz = psz_column_meta( p_item->p_input, i_index );
-            item_col_strings.append( psz );
+            item_col_strings.append( qfu( psz ) );
             free( psz );
         }
     }

modules/gui/qt4/components/playlist/sorting.h

@@ -43,7 +43,7 @@ static const char * psz_column_title( uint32_t i_column )
 {
     switch( i_column )
     {
-    case COLUMN_NUMBER:          return "";
+    case COLUMN_NUMBER:          return _("ID");
     case COLUMN_TITLE:           return VLC_META_TITLE;
     case COLUMN_DURATION:        return _("Duration");
     case COLUMN_ARTIST:          return VLC_META_ARTIST;

modules/gui/qt4/components/playlist/standardpanel.cpp

@@ -267,9 +267,8 @@ void StandardPLPanel::popupSelectColumn( QPoint pos )
 
     QMenu selectColMenu;
 
-    char *psz_title;
 #define ADD_META_ACTION( meta ) {                                              \
-    QAction* option = selectColMenu.addAction( psz_column_title( meta ) );     \
+    QAction* option = selectColMenu.addAction( qfu( psz_column_title( meta ) ) );     \
     option->setCheckable( true );                                              \
     option->setChecked( model->shownFlags() & meta );                          \
     ContextUpdateMapper->setMapping( option, meta );                           \