Adding z-index to image previews automatically

boards/static/css/base.css

@@ -13,7 +13,6 b''
 
 .img-full {
     position: fixed;
-    z-index: 9999;
     background-color: #CCC;
     border: 1px solid #000;
     cursor: pointer;

boards/static/js/image.js

@@ -85,7 +85,10 b' function addImgPreview() {'
 
                     return false;
                 }
-            ).draggable()
+            ).draggable({
+                    addClasses: false,
+                    stack: '.img-full'
+                })
         }
         else {
             $('#'+thumb_id).remove();