add work item types select on work item creation modal.
style inline form group
create work item type popover
work_group add, select on creating modeling task
management perspective grouped by 'work group'
merge eskim/work_item_types_and_groups

* work_item_types_and_groups:
  management perspective grouped by 'work group'
  work_group add, select on creating modeling task
  create work item type popover
  style inline form group
  add work item types select on work item creation modal.