message: Only show the context menu if there is something in it.
diff: @@ -58,6 +58,11 @@ export class ApplicationContextMenu {
  doLater( () => {
  this._menuEntries = commandableStackToBoundCommands(CommandType.CONTEXT_MENU, requestCommandableStack,
  this.extensionManager);
  + if (this._menuEntries.length === 0) {
  + this._menuEntries = null;
  + return;
  + }
  +
  this._contextMenuElement.innerHTML = this._menuEntries.map(
  (command: BoundCommand, index: number): string => this._boundCommandToHtml("index_" + index, command)).join("");
  this._contextMenuElement.open(ev.detail.x, ev.detail.y);
  