Error property added plus getter and checker for it
modError is instantiated when sending fails
Error getter renamed
Make preview possible if session_enabled = 0
Another version of improved widget of active users

This is the new commit for issue #11107
Now it uses subquery with nested sorting and must work on any type of database.

I have table with 45000 records and when I select last actions for 50 hours this query takes only 0.0287 sec.
Integrated multiuploaddialog into MODx core
Replacing old uploaddialog code with new multiuploaddialog code
Improved groupbe

According to http://dev.mysql.com/doc/refman/5.0/en/group-by-extensions.html
Update widget.grid-online.php
Integrated multiuploaddialog into MODx core
Replacing old uploaddialog code with new multiuploaddialog code
Revert "Replacing old uploaddialog code with new multiuploaddialog code"

This reverts commit 271b721d16c22b00873198cc065544c2d8e1dcd6.
Keep old UploadDialog for BC, support for setting 'permitted_extensions'.
Use new MultiUploadDialog
Merge conflicts from reverting a commit
Check for additional valid MIME types for zip files.

Wondered why my local transport packages aren't valid zip-files for MODx until I found out that Firefox is uploading them with MIME type 'application/x-zip-compressed'.
Ignore case on MIME type check
Update widget.grid-online.php
Improved widget of active users

* origin/pr/11244:
  Update widget.grid-online.php
  Update widget.grid-online.php
  Improved groupbe
  Another version of improved widget of active users
Added username hyperlink shortcut to update a user without requiring context menu, corrected some indentation.

* origin/pr/11285:
  Added username hyperlink shortcut to update a user without requiring context menu, corrected some indentation.