Qt: Retranslate GameList header and Filter line

Didn't notice this until I was trying to change the default font
to Comic Sans MS when language is set to English in yuzu.

src/citra_qt/game_list.cpp

@@ -136,10 +136,8 @@ GameListSearchField::GameListSearchField(GameList* parent) : QWidget{parent} {
     layout_filter = new QHBoxLayout;
     layout_filter->setContentsMargins(8, 8, 8, 8);
     label_filter = new QLabel;
-    label_filter->setText(tr("Filter:"));
     edit_filter = new QLineEdit;
     edit_filter->clear();
-    edit_filter->setPlaceholderText(tr("Enter pattern to filter"));
     edit_filter->installEventFilter(key_release_eater);
     edit_filter->setClearButtonEnabled(true);
     connect(edit_filter, &QLineEdit::textChanged, parent, &GameList::OnTextChanged);
@@ -159,6 +157,7 @@ GameListSearchField::GameListSearchField(GameList* parent) : QWidget{parent} {
     layout_filter->addWidget(label_filter_result);
     layout_filter->addWidget(button_filter_close);
     setLayout(layout_filter);
+    RetranslateUI();
 }
 
 /**
@@ -306,11 +305,7 @@ GameList::GameList(GMainWindow* parent) : QWidget{parent} {
     tree_view->setStyleSheet(QStringLiteral("QTreeView{ border: none; }"));
 
     item_model->insertColumns(0, COLUMN_COUNT);
-    item_model->setHeaderData(COLUMN_NAME, Qt::Horizontal, tr("Name"));
-    item_model->setHeaderData(COLUMN_COMPATIBILITY, Qt::Horizontal, tr("Compatibility"));
-    item_model->setHeaderData(COLUMN_REGION, Qt::Horizontal, tr("Region"));
-    item_model->setHeaderData(COLUMN_FILE_TYPE, Qt::Horizontal, tr("File type"));
-    item_model->setHeaderData(COLUMN_SIZE, Qt::Horizontal, tr("Size"));
+    RetranslateUI();
     item_model->setSortRole(GameListItemPath::SortRole);
 
     connect(main_window, &GMainWindow::UpdateThemedIcons, this, &GameList::OnUpdateThemedIcons);
@@ -667,6 +662,35 @@ void GameList::LoadCompatibilityList() {
     }
 }
 
+void GameList::changeEvent(QEvent* event) {
+    if (event->type() == QEvent::LanguageChange) {
+        RetranslateUI();
+    }
+
+    QWidget::changeEvent(event);
+}
+
+void GameList::RetranslateUI() {
+    item_model->setHeaderData(COLUMN_NAME, Qt::Horizontal, tr("Name"));
+    item_model->setHeaderData(COLUMN_COMPATIBILITY, Qt::Horizontal, tr("Compatibility"));
+    item_model->setHeaderData(COLUMN_REGION, Qt::Horizontal, tr("Region"));
+    item_model->setHeaderData(COLUMN_FILE_TYPE, Qt::Horizontal, tr("File type"));
+    item_model->setHeaderData(COLUMN_SIZE, Qt::Horizontal, tr("Size"));
+}
+
+void GameListSearchField::changeEvent(QEvent* event) {
+    if (event->type() == QEvent::LanguageChange) {
+        RetranslateUI();
+    }
+
+    QWidget::changeEvent(event);
+}
+
+void GameListSearchField::RetranslateUI() {
+    label_filter->setText(tr("Filter:"));
+    edit_filter->setPlaceholderText(tr("Enter pattern to filter"));
+}
+
 QStandardItemModel* GameList::GetModel() const {
     return item_model;
 }

src/citra_qt/game_list.h

@@ -107,6 +107,9 @@ private:
 
     QString FindGameByProgramID(QStandardItem* current_item, u64 program_id, int role);
 
+    void changeEvent(QEvent*) override;
+    void RetranslateUI();
+
     GameListSearchField* search_field;
     GMainWindow* main_window = nullptr;
     QVBoxLayout* layout = nullptr;

src/citra_qt/game_list_p.h

@@ -431,6 +431,9 @@ public:
     void setFocus();
 
 private:
+    void changeEvent(QEvent*) override;
+    void RetranslateUI();
+
     class KeyReleaseEater : public QObject {
     public:
         explicit KeyReleaseEater(GameList* gamelist, QObject* parent = nullptr);