Modified jquery.pnotify.js to operate on CSS visibility attribute in stead of display.

This way long messages in notify components don't break and resize notify when closer icon is shown or hidden.

@@ -271,7 +271,7 @@
                         pnotify.animate({"opacity": opts.pnotify_nonblock_opacity}, "fast");
                     }
                     if (opts.pnotify_hide && opts.pnotify_mouse_reset) pnotify.pnotify_cancel_remove();
-                    if (opts.pnotify_closer && !opts.pnotify_nonblock) pnotify.closer.show();
+                    if (opts.pnotify_closer && !opts.pnotify_nonblock) pnotify.closer.css("visibility", "visible");
                 },
                 "mouseleave": function(e) {
                     if (opts.pnotify_nonblock) e.stopPropagation();
@@ -280,7 +280,7 @@
                     if (opts.pnotify_nonblock && animating != "out")
                         pnotify.animate({"opacity": opts.pnotify_opacity}, "fast");
                     if (opts.pnotify_hide && opts.pnotify_mouse_reset) pnotify.pnotify_queue_remove();
-                    pnotify.closer.hide();
+                    pnotify.closer.css("visibility", "hidden");
                     $.pnotify_position_all();
                 },
                 "mouseover": function(e) {
@@ -535,10 +535,10 @@
             // Provide a button to close the notice.
             pnotify.closer = $14("<div />", {
                 "class": "rf-ny-cl",
-                "css": {"cursor": "pointer", "display": "none"},
+                "css": {"cursor": "pointer", "visibility": "hidden"},
                 "click": function() {
                     pnotify.pnotify_remove();
-                    pnotify.closer.hide();
+                    pnotify.closer.css("visibility", "hidden");
                 }
             })
                     .append($14("<span />", {"class": "rf-ny-cl-ic"}))