Ability to customise metrics within Tymeshift

Due to the way we work a few of the Tymeshift metrics don't provide as accurate a number as we like - i.e:

- Resolution rate is done against solved points/assigned points - however our teams work from ticket groups instead of directly assigning out tickets to agents as we focus on SLA and then age for escalated tickets. Tickets only become assigned after an update has been made by the agent so more often is not eligible to counted as assigned work and we only see the res rate much higher (sometimes above 100%) due to this. 

For this reason we'd love to be able to customise the metrics to match our needs - i.e: Resolution rate using solved points/handled points would provided a more true reflection.