Do not process resize event if fotorama is hidden

Resize event recalcs image dimensions in wrong way (see example https://jsfiddle.net/doochik/1mdhtbav/).
In this case we should stop processing resize event if fotorama is hidden.
As a workaround for this bug we can use `position:abosulte;left:-9990px;top:-9999px` instead of `display: none` to hide fotorama.

src/js/fotorama.js

@@ -1229,7 +1229,8 @@ jQuery.Fotorama = function ($fotorama, opts) {
   });
 
   that.resize = function (options) {
-    if (!data) return this;
+    // don't process resize for hidden elements
+    if (!data || $wrap.is(':hidden')) return this;
 
     var time = arguments[1] || 0,
         setFLAG = arguments[2];