fix bar crashing on monitor add/remove

include/widgets/controlCenter/timer.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <memory>
+#include <sigc++/connection.h>
 #include <sys/types.h>
 #include "components/timer.hpp"
 #include "services/timerService.hpp"
@@ -9,6 +10,7 @@
 class TimerWidget : public Gtk::Box {
   public:
     TimerWidget();
+    ~TimerWidget();
     void addTimer(const std::string &duration, uint64_t timerId);
     void removeTimer(uint64_t timerId);
     void activateTimer(uint64_t timerId);
@@ -19,4 +21,8 @@ class TimerWidget : public Gtk::Box {
     std::string rawDigits;
 
     std::map<uint64_t, std::unique_ptr<Timer>> activeTimers;
+    sigc::connection timerSetConnection;
+    sigc::connection timerCancelledConnection;
+    sigc::connection timerExpiredConnection;
+    sigc::connection tickConnection;
 };