[Bug] Elapsed time for re-opened cases is showed as "closed".

[effedielle]

Request Type

Bug

Work Environment

OS version (server)	Ubuntu 20.04 LTS
OS version (client)	Windows 10
TheHive version	4.0.5-1
Package Type	DEB from Ubuntu repo
Browser type & version	Firefox 60.4.0 - Chrome 88.0.4324.150

Problem Description

If you re-open a previously closed case, it is still listed as "closed after", instead of "open since."

Steps to Reproduce

1. create a case
2. close it
3. reopen it
4. filter case list for "status" = "Open"