Add option to display plugin running state in system tray

src/utility.cpp

@@ -12,6 +12,7 @@
 #include <QTimer>
 #include <QMessageBox>
 #include <QJsonDocument>
+#include <QSystemTrayIcon>
 #include <unordered_map>
 #include <regex>
 #include <set>
@@ -443,6 +444,17 @@ bool DisplayMessage(const QString &msg, bool question)
 	return false;
 }
 
+void DisplayTrayMessage(const QString &title, const QString &msg)
+{
+	auto tray = reinterpret_cast<QSystemTrayIcon *>(
+		obs_frontend_get_system_tray());
+	if (!tray) {
+		return;
+	}
+
+	tray->showMessage(title, msg);
+}
+
 void addSelectionEntry(QComboBox *sel, const char *description, bool selectable,
 		       const char *tooltip)
 {