message: Focus the empty pane menu after split command
  issue
diff: @@ -805,7 +805,6 @@ export class MainWebUi extends ThemeableElementBase implements AcceptsKeybinding
  // FIXME This is a work-around for the problem where new tabs can't get the focus immediately.
  if ( ! DomUtils.activeNestedElements().includes(tabContentElement)) {
  - this._log.warn(`Failed to focus content element: `, tabContentElement.tagName);
  doLater(() => {
  this._splitLayout.showTabByTabContent(tabContentElement);
  this._focusTabContent(tabContentElement);
  @@ -928,7 +927,11 @@ export class MainWebUi extends ThemeableElementBase implements AcceptsKeybinding
  const element = this._splitLayout.getEmptyContentByTabWidget(newTabWidget);
  if (element != null) {
  if (element instanceof EmptyPaneMenu) {
  - element.focus();
  + // I can't figure out why a focusElement() doesn't work immediately.
  + // It does work later though.
  + doLater(() => {
  + focusElement(element, this._log);
  + });
  }
  } else {
  const tabWidget = this._splitLayout.getTabWidgetByTabContent(tabContentElement);
  