Update jquery.webfonts from upstream

Change-Id: Ic3baa18b01a972f08e51e84217e82d0939e674c0

lib/jquery.webfonts.js

@@ -100,6 +100,16 @@
 				$element.css( 'font-family', fontStack.join() );
 			}
 
+			if ( !fontFamily || fontFamily === this.originalFontFamily ) {
+				// We are resetting the font to original font.
+				// Do not explicitly set fontFamily for child nodes. Just remove
+				// the previous setting.
+				$element.find( 'textarea, input, button' )
+					.not( this.options.exclude )
+					.css( 'font-family', '' );
+
+				return;
+			}
 			// Set the font of this element's children if they are not excluded.
 			// font-family of <input>, <textarea> and <button> must be changed explicitly.
 			$element.find( 'textarea, input, button' )