add clear to route class

lib/Navigation/route.cpp

@@ -97,6 +97,10 @@ void Route::addPointToRoute(Point point) {
     this->points.push_back(point);
 }
 
+void Route::clear() {
+    this->points.clear();
+}
+
 Point Route::startRoute() {
     if (this->points.size() < 1)
         return Point(0, 0);

lib/Navigation/route.h

@@ -131,6 +131,7 @@ class Route {
          * @param point 
          */
         void addPointToRoute(Point point);
+        void clear();
 
         /**
          * @brief Select the first point as target