Windows: enable mouse events in Simulator on all skins

[XeduR]

I've spent too many hours on Windows debugging why mouse events weren't firing only to remember that I was simulating an iOS device. 😅 Currently adding mouse events just fails silently on Simulator, but key events work just fine and they just give out a warning when simulating unsupported devices, so I replicated that behaviour for mouse events.

Changes

• Add iOS/tvOS/WinPhone to the Simulator's supportsMouse config so mouse events fire on those skins (they were blocked on Windows), matching how key events already warn-and-fire
  • Just adding Windows Phone here since the option exists in the Simulator (in case some poor soul selects it)
• Extend the init.lua simulated-device warning to cover "mouse" as well as "key", reminding devs the events won't fire on a real devices
• Report mouse as an available event source on macOS and Linux so Runtime:hasEventSource("mouse") returns true instead of returning false / asserting in debug
• Also adding a third optional suppressSimulatorWarning parameter to Runtime:addEventListener to suppress "key" and "mouse" warnings on the Simulator
  • Making the Simulator's/Welcome Screen's own internal mouse-cursor listener suppress warnings so it won't fire every time when simulating unsupported devices/skins

To test

Create an empty projects and just copy this to main.lua. Then run the project on the Simulator while simulating iOS, tvOS or Windows Phone device.

-- Called when a mouse event has been received.
local function onMouseEvent( event )
	if event.type == "down" then
		if event.isPrimaryButtonDown then
			print( "Left mouse button clicked." )
		elseif event.isSecondaryButtonDown then
			print( "Right mouse button clicked." )        
		end
	end
end

-- Add the mouse event listener.
Runtime:addEventListener( "mouse", onMouseEvent )

-- Optionally, suppress the warning on the Simulator.
-- Runtime:addEventListener( "mouse", onMouseEvent, true )