Force camera aspect ratio change

@kadst43 This is a quick fix for the camera's aspect ratio not being correct on load, by making the condition for the aspect change to be that the canvas aspect and the camera aspect don't match on window resize. @BrettASwift I'm not sure if this messes with any of the editor stuff you're doing, but I don't think it should..

@eric79 
I know that these are definitely the same at this point, but I think we should set the viewport to the canvas width and height since the renderer is actually rendering into the canvas instead of the whole window.