feat: update icon theme on theme change

src/lib/gui/MainWindow.cpp

@@ -1049,6 +1049,15 @@ void MainWindow::hide()
   m_actionMinimize->setVisible(false);
 }
 
+void MainWindow::changeEvent(QEvent *e)
+{
+  QMainWindow::changeEvent(e);
+  if (e->type() == QEvent::PaletteChange) {
+    updateIconTheme();
+    setTrayIcon();
+  }
+}
+
 void MainWindow::showConfigureServer(const QString &message)
 {
   ServerConfigDialog dialog(this, serverConfig());

src/lib/gui/MainWindow.h

@@ -89,6 +89,9 @@ public:
 
   void hide();
 
+protected:
+  void changeEvent(QEvent *e) override;
+
 private:
   void toggleLogVisible(bool visible);