fix: display correct tenant (#3805)

* display correct tenant

* fix sonar

Author: Mnickii

src/app/views/main-header/Tenant.tsx

@@ -4,12 +4,12 @@ import { useAppSelector } from '../../../store'
 import { translateMessage } from '../../utils/translate-messages'
 import { useHeaderStyles } from './utils'
 
-const tooltipContent = `${translateMessage('Using demo tenant')} ${translateMessage('To access your own data:')}`
-
 const Tenant = ()=>{
   const styles = useHeaderStyles()
   const user = useAppSelector(state => state.profile.user)
-  const secondaryContent = user && user.tenant ? user.tenant : 'Sample'
+  const secondaryContent = user?.tenant ?? 'Sample'
+  const tooltipContent = user?.tenant
+    ?? `${translateMessage('Using demo tenant')} ${translateMessage('To access your own data:')}`
 
   return (
     <Tooltip content={tooltipContent} relationship="description">