PLT-6987 User access token UI (#7007)

* Add user access token UI

* Fix enter press and update mattermost-redux

* Updating UI for access token stuff (#7066)

* Revert segment key

webapp/sass/components/_alerts.scss

@@ -11,3 +11,4 @@
     margin: 1px 0 0 10px;
     padding: 4px 10px;
 }
+