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
What is this line?  For a future text?  By the way, for using translations, the recommended way is to use the service **localization** (`$services.localization` in Velocity).