feat: Better SLA missed events popover (#9215)

* feat: SLA events component

* feat: Add SLA event item component

* Update SLAPopoverCard.vue

* Update SLAPopoverCard.vue

* fix: Translation

* Update SLAEventItem.vue

* feat: complete sticky nrt

* chore: code cleanup

* Update SLACardLabel.vue

* chore: code cleanup

* chore: away click fixes

* feat: use tabular nums

---------

Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>

app/javascript/dashboard/i18n/locale/en/conversation.json

@@ -71,12 +71,6 @@
         "RT": "RT {status}",
         "MISSED": "missed",
         "DUE": "due"
-      },
-      "SLA_POPOVER": {
-        "FRT": "First Response Time",
-        "NRT": "Next Response Time",
-        "RT": "Resolution Time",
-        "MISSED": "missed on"
       }
     },
     "RESOLVE_DROPDOWN": {