Hi experts,
It's been a long time since I set up the Osticket to manage customer requests (support) but also I've been struggling for a long time.
I want to add a field on the detail of the ticket, to manage the processing time (time spent) and the time invoiced on a task and this field must have a list of choices (Day, Hour, Minute) and if possible with different separators . 
Example,
- if the agent spends 2 hours, on the field I select "Hour", while entering the value "2"
- if the agent spends 2 and a half hours, on the field I select "" Hour, while entering the value "2:30" (separator 2 points)
- if the agent spends 4 days, on the field I select "Day", while entering the value "4" (1 point separator).
Currently, I manage in the same area with an input mask, in Regular expressions, with 02:00 H, 02:30 H, 04.00 D.
I would be grateful if you help me solve this puzzle.