feat: qa improvements for backups page (#4857)

* feat: fix backup action disabling logic

* feat: allow actions when backup is being created

* feat: qa fixes

* feat: backups empty state

* fix: lint

* intl:extract

---------

Co-authored-by: Prospector <6166773+Prospector@users.noreply.github.com>

packages/ui/src/locales/en-US/index.json

@@ -857,12 +857,6 @@
   "servers.backups.item.failed-to-restore-backup": {
     "defaultMessage": "Failed to restore from backup"
   },
-  "servers.backups.item.lock": {
-    "defaultMessage": "Lock"
-  },
-  "servers.backups.item.locked": {
-    "defaultMessage": "Locked"
-  },
   "servers.backups.item.manual-backup": {
     "defaultMessage": "Manual backup"
   },
@@ -884,9 +878,6 @@
   "servers.backups.item.retry": {
     "defaultMessage": "Retry"
   },
-  "servers.backups.item.unlock": {
-    "defaultMessage": "Unlock"
-  },
   "servers.notice.dismiss": {
     "defaultMessage": "Dismiss"
   },