Use Qt::Literals::StringLiterals

src/smartplaylists/smartplaylistsearch.cpp

@@ -28,7 +28,7 @@
 
 #include "smartplaylistsearch.h"
 
-using namespace Qt::StringLiterals;
+using namespace Qt::Literals::StringLiterals;
 
 SmartPlaylistSearch::SmartPlaylistSearch() : search_type_(SearchType::And), sort_type_(SortType::Random), sort_field_(SmartPlaylistSearchTerm::Field::Title), limit_(-1), first_item_(0) { Reset(); }
 

src/smartplaylists/smartplaylistsearchterm.cpp

@@ -29,7 +29,7 @@
 #include "smartplaylistsearchterm.h"
 #include "playlist/playlist.h"
 
-using namespace Qt::StringLiterals;
+using namespace Qt::Literals::StringLiterals;
 
 SmartPlaylistSearchTerm::SmartPlaylistSearchTerm() : field_(Field::Title), operator_(Operator::Equals), datetype_(DateType::Hour) {}
 

src/smartplaylists/smartplaylistsearchtermwidget.cpp

@@ -41,7 +41,7 @@
 #include "smartplaylistsearchtermwidgetoverlay.h"
 #include "ui_smartplaylistsearchtermwidget.h"
 
-using namespace Qt::StringLiterals;
+using namespace Qt::Literals::StringLiterals;
 
 SmartPlaylistSearchTermWidget::SmartPlaylistSearchTermWidget(SharedPtr<CollectionBackend> collection_backend, QWidget *parent)
     : QWidget(parent),