Add option to display plugin running state in system tray

src/headers/advanced-scene-switcher.hpp

@@ -164,6 +164,7 @@ public slots:
 
 	void on_verboseLogging_stateChanged(int state);
 	void on_saveWindowGeo_stateChanged(int state);
+	void on_showTrayNotifications_stateChanged(int state);
 	void on_uiHintsDisable_stateChanged(int state);
 
 	void on_exportSettings_clicked();

src/headers/switcher-data-structs.hpp

@@ -70,6 +70,7 @@ struct SwitcherData {
 	bool stop = false;
 	bool verbose = false;
 	bool disableHints = false;
+	bool showSystemTrayNotifications = false;
 	bool showFrame = false;
 	bool transitionOverrideOverride = false;
 	bool adjustActiveTransitionType = true;

src/headers/utility.hpp

@@ -55,6 +55,7 @@ void listAddClicked(QListWidget *list, QWidget *newWidget,
 bool listMoveUp(QListWidget *list);
 bool listMoveDown(QListWidget *list);
 bool DisplayMessage(const QString &msg, bool question = false);
+void DisplayTrayMessage(const QString &title, const QString &msg);
 void addSelectionEntry(QComboBox *sel, const char *description,
 		       bool selectable = false, const char *tooltip = "");
 void populateTransitionSelection(QComboBox *sel, bool addCurrent = true,