Explanation of the thematic changes to 17A17A"I'm Forever __________" (Song sung by West Ham fans)[----------], 40A40AWhat the toilets at the mall, a Portaloo or, to an extent, the woods all are[-------------], and 60A60AStereotypical drinkers of Pumpkin Spice Lattes[----------], and also what may cause the disappearance of what's circled in the grid