Update enterprise_edition_left_panel.tsx

Fix handle click `+Add Seats` button to ensure checks for expansion availability look at service settings OR expansion availability are

webapp/channels/src/components/admin_console/license_settings/enterprise_edition/enterprise_edition_left_panel.tsx

@@ -100,7 +100,7 @@ const EnterpriseEditionLeftPanel = ({
     );
 
     const handleClickAddSeats = () => {
-        if (!isSelfHostedExpansionEnabled && !canExpand) {
+        if (!isSelfHostedExpansionEnabled || !canExpand) {
             window.open(expandableLink(unsanitizedLicense.Id), '_blank');
         } else {
             selfHostedExpansionModal.open();