Error property added plus getter and checker for it
modError is instantiated when sending fails
Error getter renamed
add the legacy multiple select drop down option
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
Added legacy multiple select drop down TV

* origin/pr/744:
  add the legacy multiple select drop down option
Back-button hides during install, fixing #11259
Updated System Info to reflect latest PHPMailer version from PR #11157
Fix some mistakes
Fixed a few actions for access policies
Fixed a few actions for access policies

* origin/pr/11270:
  Fixed a few actions for access policies
Updated System Info to reflect latest PHPMailer version from PR #11157

* origin/pr/11267:
  Updated System Info to reflect latest PHPMailer version from PR #11157
Hide Back-button during install

* origin/pr/11260:
  Back-button hides during install, fixing #11259
Updated russian lexicons

* origin/pr/11268:
  Fix some mistakes
tmp
tmp
tmp again