filebrowser: only move files when source and destination path is unequal

vispa/extensions/file/static/js/base/events.js

@@ -202,6 +202,7 @@ var FileBaseEvents = Class.extend({
       event.preventDefault();
       $(node).removeClass("file-dragover");
       fileToBeMoved = (event.originalEvent.dataTransfer.getData('dataName'));
+      // if transfered data empty: upload
       if (fileToBeMoved == "") {
         if (data.type == "d") {
           var path = self.FileBase.workflow.path + '/' + data.name;
@@ -209,10 +210,14 @@ var FileBaseEvents = Class.extend({
           var path = self.FileBase.workflow.path;
         }
         self.FileBase.actions.upload(path);
-      } else {
-        var source = self.FileBase.workflow.path + '/' + fileToBeMoved;
-        var destination = self.FileBase.workflow.path + '/' + data.name;
-        self.FileBase.actions.move(source, destination);
+      }
+      // if transfered data not empty: move
+      else {
+        if (data.type == "d") {
+          var source = self.FileBase.workflow.path + '/' + fileToBeMoved;
+          var destination = self.FileBase.workflow.path + '/' + data.name;
+          self.FileBase.actions.move(source, destination);
+        }
       }
     });