Dialog: Don't use deprecated offset option for .position(). Fixes #8675 - Dialog: Position with pixels in array doesn't work with back compat disabled.

Author: scottgonzalez

ui/jquery.ui.dialog.js

@@ -509,9 +509,9 @@ $.widget("ui.dialog", {
 				});
 
 				position = {
-					my: myAt.join( " " ),
-					at: myAt.join( " " ),
-					offset: offset.join( " " )
+					my: myAt[0] + (offset[0] < 0 ? offset[0] : "+" + offset[0]) + " " +
+						myAt[1] + (offset[1] < 0 ? offset[1] : "+" + offset[1]),
+					at: myAt.join( " " )
 				};
 			}