Total Time spend in ticket default View and as column in list View

Total Time spend in ticket default View and as column in list View

Hello, 

to have a quick idea of severity of ticket or to have a easy information on how many time team spent on tickets, it would be nice to have, in the ticket view , a field with the total time spent. 
Same for Table view, it would be nice to have this field as a colmun ! 

/BR

Stéphane