Added a message box popup asking to quit the game to the default error handler, activated when the mouse is pressed or the screen is tapped. This is mostly useful on mobile devices where users can't press 'escape'.

src/scripts/boot.lua

@@ -633,9 +633,16 @@ function love.errhand(msg)
 		for e, a, b, c in love.event.poll() do
 			if e == "quit" then
 				return
-			end
-			if e == "keypressed" and a == "escape" then
+			elseif e == "keypressed" and a == "escape" then
 				return
+			elseif e == "mousereleased" then
+				local name = love.window.getTitle()
+				if #name == 0 then name = "Game" end
+				local buttons = {"OK", "Cancel"}
+				local pressed = love.window.showMessageBox("Quit "..name.."?", "", buttons)
+				if pressed == 1 then
+					return
+				end
 			end
 		end