TASKMAN-17 : Adjust the single task view UI

TASKMAN-17 : Adjust the single task view UI and also 
TASKMAN-18 : Adjust the single task edit UI

Added the Creation Date field which is not editable
Adjusted the English translation for the new field
Should be `for="TaskManager.TaskManagerClass_0_description"` instead of `for="TaskManager.TaskManagerClass_0_duedate"`.