NEW YORK (TheStreet) -- Diners may soon notice more big changes at their Friday evening happy hour spot, DineEquity (DIN - Get Report) owned Applebee's. Long known as a suburban staple with a menu featuring tried-and-true entrees and cocktails, Applebee's has been undergoing a transformation of its menu and dcor during the last few years. Since December 2007, 90% of the Applebee's menu has been upgraded...