Fix problem with camera path not finishing properly on skipToEnd

include/openspace/navigation/path.h

@@ -75,6 +75,12 @@ public:
      */
     CameraPose traversePath(double dt, float speedScale = 1.f);
 
+    /**
+     * Function that can be used to permaturely quit a path ,for example when skipping
+     * to the end
+     */
+    void quitPath();
+
     /**
      * Return the identifer of the node that is the current appropriate anchor node, of
      * the start and end waypoint's reference node. Dtermined based on how far along the