Adddress issue #1947 #1947 Problem on users visibility based on "Can Assign Records To" set to "Users having Same Role or Subordinate Role" in role configuration.

#1572 avoid running cronjob tasks if they are already running. Change status to ERROR on exceptions.

Allowing role based picklist values in list view, summay and detail view of record along with Reports

Fixes #356 - Labels under the "Customize" button not translated.
Fixes #360 - Broken Reports

Usability issues in users list view