Sortable: Only animate along the specified axis when reverting. Fixes…

… #7415 - Sortable: Incorrect revert animation with axis: 'y'.

ui/jquery.ui.sortable.js

@@ -417,14 +417,18 @@ $.widget("ui.sortable", $.ui.mouse, {
 
 		if(this.options.revert) {
 			var that = this,
-				cur = this.placeholder.offset();
+				cur = this.placeholder.offset(),
+				axis = this.options.axis,
+				animation = {};
 
+			if ( !axis || axis === "x" ) {
+				animation.left = cur.left - this.offset.parent.left - this.margins.left + (this.offsetParent[0] === document.body ? 0 : this.offsetParent[0].scrollLeft);
+			}
+			if ( !axis || axis === "y" ) {
+				animation.top = cur.top - this.offset.parent.top - this.margins.top + (this.offsetParent[0] === document.body ? 0 : this.offsetParent[0].scrollTop);
+			}
 			this.reverting = true;
-
-			$(this.helper).animate({
-				left: cur.left - this.offset.parent.left - this.margins.left + (this.offsetParent[0] === document.body ? 0 : this.offsetParent[0].scrollLeft),
-				top: cur.top - this.offset.parent.top - this.margins.top + (this.offsetParent[0] === document.body ? 0 : this.offsetParent[0].scrollTop)
-			}, parseInt(this.options.revert, 10) || 500, function() {
+			$(this.helper).animate( animation, parseInt(this.options.revert, 10) || 500, function() {
 				that._clear(event);
 			});
 		} else {