Sortable: Moved change of helper position css. Fixed #5321 – Helper i…

…n a bottom-positioned Sortable is positioned wrong on drag start.

ui/jquery.ui.sortable.js

@@ -154,11 +154,6 @@ $.widget("ui.sortable", $.ui.mouse, {
 			left: this.offset.left - this.margins.left
 		};
 
-		// Only after we got the offset, we can change the helper's position to absolute
-		// TODO: Still need to figure out a way to make relative sorting possible
-		this.helper.css("position", "absolute");
-		this.cssPosition = this.helper.css("position");
-
 		$.extend(this.offset, {
 			click: { //Where the click happened, relative to the element
 				left: event.pageX - this.offset.left,
@@ -168,6 +163,11 @@ $.widget("ui.sortable", $.ui.mouse, {
 			relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper
 		});
 
+		// Only after we got the offset, we can change the helper's position to absolute
+		// TODO: Still need to figure out a way to make relative sorting possible
+		this.helper.css("position", "absolute");
+		this.cssPosition = this.helper.css("position");
+
 		//Generate the original position
 		this.originalPosition = this._generatePosition(event);
 		this.originalPageX = event.pageX;