TheHiveButton: better headers of observable tables

thehive_button/public/vis_controller.js

@@ -511,7 +511,7 @@ class ObservablesTable extends Component {
       <>
         <EuiAccordion
           id="accordion-{this.props.fieldName}"
-          buttonContent={<EuiTitle size="xs"><h4>{this.props.fieldName} ({n_obs})</h4></EuiTitle>}
+          buttonContent={<EuiTitle size="xs"><h4>{this.props.fieldName.replace(/\.keyword$/, "")} ({this.props.obsSel.length}/{n_obs})</h4></EuiTitle>}
           initialIsOpen={n_obs <= 3}
         >
           <EuiBasicTable