Method Update

src/station_gui.cpp:1134–1138

* Update the count for this entry and propagate the change to the parent entry * if there is one. * @param count the amount to be added to this entry */

 * @param count the amount to be added to this entry
 */
void CargoDataEntry::Update(uint count)
{
	this->count += count;
	if (this->parent != nullptr) this->parent->Update(count);
}

/**
 * Increment