Add warning for blast smelter 2 upgrade

Every play-through, I ran into the same trap: I upgrade all my blast smelters just to notice that the standard recipe is no longer available (need to crush ores first, no materials left to set up crusher). It is okay to mix things up a bit, but a warning would be nice if you have a recipe selected in the building queue that will no longer be available after the building is upgraded.

that's your own fault not really a problem

F**k around, find out. It could be the name of the game! There is nothing to win in this game, figuring it out is all the fun and no game ever reached this level of sandboxing nirvana!
I made myself a blueprint for my steel setup with blast furnace 2, then retrofitted all buildings to level 1 so that when I will switch to blast furnace 2 everything is ready, I only have to upgrade the buildings from 1 to 2. All 3 input belts are already in place, limestone is already at the mouth of the furnace and you only need to start crushing your iron ore before feeding the furnace 2.
The game is all about figuring this out ! Enjoy it because when you will have it all figured out... you be bored again...
Peace