thermostat: Clear alarm when settings are loaded

src/thermostat/thermostat.rs

@@ -601,6 +601,7 @@ impl Thermostat {
         if !settings.pid_engaged {
             self.set_i(settings.tec_settings.i_set.value);
         }
+        self.clear_temp_mon_alarm();
         self.set_default_pwr_on(settings.default_pwr_on);
         if settings.default_pwr_on {
             self.power_up();