Qt: Fix grid scale resetting on theme change

Closes #8044.

pcsx2-qt/GameList/GameListModel.cpp

@@ -132,13 +132,14 @@ GameListModel::GameListModel(QObject* parent /* = nullptr */)
 	, m_cover_pixmap_cache(MIN_COVER_CACHE_SIZE)
 {
 	loadCommonImages();
+	setCoverScale(1.0f);
 	setColumnDisplayNames();
 }
 GameListModel::~GameListModel() = default;
 
-void GameListModel::refreshImages()
+void GameListModel::reloadThemeSpecificImages()
 {
-	loadCommonImages();
+	loadThemeSpecificImages();
 	refresh();
 }
 
@@ -562,20 +563,24 @@ QIcon GameListModel::getIconForRegion(GameList::Region region)
 		QStringLiteral("%1/icons/flags/%2.png").arg(QtHost::GetResourcesBasePath()).arg(GameList::RegionToString(region)));
 }
 
-void GameListModel::loadCommonImages()
+void GameListModel::loadThemeSpecificImages()
 {
 	for (u32 type = 0; type < static_cast<u32>(GameList::EntryType::Count); type++)
 		m_type_pixmaps[type] = getIconForType(static_cast<GameList::EntryType>(type)).pixmap(QSize(24, 24));
 
 	for (u32 i = 0; i < static_cast<u32>(GameList::Region::Count); i++)
 		m_region_pixmaps[i] = getIconForRegion(static_cast<GameList::Region>(i)).pixmap(QSize(42, 30));
+}
+
+void GameListModel::loadCommonImages()
+{
+	loadThemeSpecificImages();
 
 	const QString base_path(QtHost::GetResourcesBasePath());
 	for (u32 i = 1; i < GameList::CompatibilityRatingCount; i++)
 		m_compatibility_pixmaps[i].load(QStringLiteral("%1/icons/star-%2.png").arg(base_path).arg(i - 1));
 
 	m_placeholder_pixmap.load(QStringLiteral("%1/cover-placeholder.png").arg(base_path));
-	setCoverScale(1.0f);
 }
 
 void GameListModel::setColumnDisplayNames()

pcsx2-qt/GameList/GameListModel.h

@@ -66,7 +66,7 @@ public:
 	__fi const QString& getColumnDisplayName(int column) { return m_column_display_names[column]; }
 
 	void refresh();
-	void refreshImages();
+	void reloadThemeSpecificImages();
 
 	bool titlesLessThan(int left_row, int right_row) const;
 
@@ -85,6 +85,7 @@ public:
 
 private:
 	void loadCommonImages();
+	void loadThemeSpecificImages();
 	void setColumnDisplayNames();
 	void loadOrGenerateCover(const GameList::Entry* ge);
 	void invalidateCoverForPath(const std::string& path);

pcsx2-qt/GameList/GameListWidget.cpp

@@ -260,9 +260,9 @@ void GameListWidget::cancelRefresh()
 		QApplication::processEvents(QEventLoop::ExcludeUserInputEvents, 1);
 }
 
-void GameListWidget::refreshImages()
+void GameListWidget::reloadThemeSpecificImages()
 {
-	m_model->refreshImages();
+	m_model->reloadThemeSpecificImages();
 }
 
 void GameListWidget::onRefreshProgress(const QString& status, int current, int total)

pcsx2-qt/GameList/GameListWidget.h

@@ -59,7 +59,7 @@ public:
 
 	void refresh(bool invalidate_cache);
 	void cancelRefresh();
-	void refreshImages();
+	void reloadThemeSpecificImages();
 
 	bool isShowingGameList() const;
 	bool isShowingGameGrid() const;

pcsx2-qt/MainWindow.cpp

@@ -1478,7 +1478,7 @@ void MainWindow::onToolsCoverDownloaderTriggered()
 void MainWindow::updateTheme()
 {
 	QtHost::UpdateApplicationTheme();
-	m_game_list_widget->refreshImages();
+	m_game_list_widget->reloadThemeSpecificImages();
 }
 
 void MainWindow::updateLanguage()