Load custom theme before initializing main window

Improves debug build startup time with custom themes

src/app/application.cpp

@@ -615,7 +615,6 @@ int Application::exec(const QStringList &params)
 #else
     UIThemeManager::initInstance();
     m_window = new MainWindow;
-    UIThemeManager::instance()->applyStyleSheet();
 #endif // DISABLE_GUI
 
     m_running = true;

src/gui/uithememanager.cpp

@@ -88,6 +88,7 @@ UIThemeManager::UIThemeManager()
         else {
             loadColorsFromJSONConfig();
             applyPalette();
+            applyStyleSheet();
         }
     }
 }
@@ -99,11 +100,6 @@ UIThemeManager *UIThemeManager::instance()
 
 void UIThemeManager::applyStyleSheet() const
 {
-    if (!m_useCustomTheme) {
-        qApp->setStyleSheet({});
-        return;
-    }
-
     QFile qssFile(":uitheme/stylesheet.qss");
     if (!qssFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
         qApp->setStyleSheet({});

src/gui/uithememanager.h

@@ -45,8 +45,6 @@ public:
     static void freeInstance();
     static UIThemeManager *instance();
 
-    void applyStyleSheet() const;
-
     QString getIconPath(const QString &iconId) const;
     QIcon getIcon(const QString &iconId, const QString &fallback = {}) const;
     QIcon getFlagIcon(const QString &countryIsoCode) const;
@@ -58,6 +56,7 @@ private:
     QString getIconPathFromResources(const QString &iconId, const QString &fallback = {}) const;
     void loadColorsFromJSONConfig();
     void applyPalette() const;
+    void applyStyleSheet() const;
 
     static UIThemeManager *m_instance;
     QHash<QString, QColor> m_colors;