Added automated mode for ParticleRain

Note the checkbox is just above the text input box. So if you want to
start auto mode, click above it and then enter the number of balls you
want to have automated.
Modified Automated Mode

If you want automated mode, you have to click the invisible check box
just a little bit above, on the right of input box
Merge remote-tracking branch 'origin/ParticleAutomated'

Conflicts:
	Assets/Dialogs/InputDialog.xml
	Source/GameApplication/Main.cpp
	Source/GameApplication/TowerOfDoomController.cpp
	Source/GameApplication/TowerOfDoomController.h