User Tasks List form improvements

User Tasks List form:

• “Due Date” datepicker filter:
  • was added for List form -> next to Description filter; 
  • was added for bucket view -> next to Search filter; 
  • user can fill From / To date Range;
  • if the Task has Due Date -> the user selected Date in the filter datepicker:
    • Tasks are filtered by the Due Date field in the bucket mode;
    • Tasks are filtered by the Due Date column on the List form;
• “Assigned to” dropdown filter:
  • was added for List form -> next to Due Date filter; 
  • was added for bucket view -> next to Due Date filter;
  • contains the List of Users in the System;
  • enabled the ability to add more than one user; 
  • “Unassigned” variation is enabled at the top of the Users List;
  • if the user is checked:
    • the Tasks for checked user are displayed;
    • by default is checked logged in user;
  • if the “Unassigned” variation is checked:
    • the Tasks without assigned users are displayed.