Particle System doesn't always play when ParticleSystem.Play() is called

Added a line to the API documentation of ParticleSystem.Play(), to clarify this behavior: **Note**: If you invoke this function again before the particle system has had time to spawn a particle, the particle system restarts its internal counters. This means that if you invoke this function continuously, a particle system with a low emission rate will never start to play.

Added a line to the API documentation of ParticleSystem.Play(), to clarify this behavior: **Note**: If you invoke this function again before the particle system has had time to spawn a particle, the particle system restarts its internal counters. This means that if you invoke this function continuously, a particle system with a low emission rate will never start to play.

Added a line to the API documentation of ParticleSystem.Play(), to clarify this behavior: **Note**: If you invoke this function again before the particle system has had time to spawn a particle, the particle system restarts its internal counters. This means that if you invoke this function continuously, a particle system with a low emission rate will never start to play.

Added a line to the API documentation of ParticleSystem.Play(), to clarify this behavior: **Note**: If you invoke this function again before the particle system has had time to spawn a particle, the particle system restarts its internal counters. This means that if you invoke this function continuously, a particle system with a low emission rate will never start to play.