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
Using this will make `number` (which is internal stuff) editable by the users.  We probably don't want that, do we?