Wire up more Posthog tracking (#7689)

src/components/views/dialogs/DeactivateAccountDialog.tsx

@@ -199,10 +199,12 @@ export default class DeactivateAccountDialog extends React.Component<IProps, ISt
 
         // this is on purpose not a <form /> to prevent Enter triggering submission, to further prevent accidents
         return (
-            <BaseDialog className="mx_DeactivateAccountDialog"
+            <BaseDialog
+                className="mx_DeactivateAccountDialog"
                 onFinished={this.props.onFinished}
                 titleClass="danger"
                 title={_t("Deactivate Account")}
+                screenName="DeactivateAccount"
             >
                 <div className="mx_Dialog_content">
                     <p>{ _t(