make suggestion box focus more robust, require more explicit enabling (#7123)

webapp/plugins/jira/components/settings.jsx

@@ -206,6 +206,7 @@ export default class JIRASettings extends AdminSettings {
                             disabled={!this.state.enabled}
                             type='input'
                             requiredCharacters={0}
+                            openOnFocus={true}
                         />
                     </div>
                 </Setting>