TimeoutHelper: Allow resetting the last value

lib/TimeoutHelper/TimeoutHelper.cpp

@@ -22,6 +22,11 @@ void TimeoutHelper::extend(uint32_t ms)
     timeout += ms;
 }
 
+void TimeoutHelper::reset()
+{
+    startMillis = millis();
+}
+
 bool TimeoutHelper::occured()
 {
     return millis() > (startMillis + timeout);

lib/TimeoutHelper/TimeoutHelper.h

@@ -8,6 +8,7 @@ public:
     TimeoutHelper();
     void set(uint32_t ms);
     void extend(uint32_t ms);
+    void reset();
     bool occured();
 
 private: