Revert of CHanged to add triggering KeyCode.

| Option             | Default  | Description |

| ---                | ---      | ---         |

| triggerChar        | @        | The character that will trigger the menu behavior. |

| triggerCharKeyCode |          | The key code that can trigger the menu behavior - use [keycode.info](http://keycode.info/) to help you find the correct key code |

| maxItems           |          | Limit the number of items shown in the pop-up menu. The default is no limit. |

| mentionSelect      |          | An optional function to format the selected item before inserting the text. |

| labelKey           | label    | The field to be used as the item label (when the items are objects). |

  @Input() set mentionConfig(config:any) {

    this.triggerChar = config.triggerChar || this.triggerChar;

    this.triggerCharKeyCode = config.triggerCharKeyCode;

    this.labelKey = config.labelKey || this.labelKey;

    this.disableSearch = config.disableSearch || this.disableSearch;

    this.maxItems = config.maxItems || this.maxItems;

  // the character that will trigger the menu behavior

  private triggerChar: string = "@";

  // the character keycode which can also trigger the menu behavior

  private triggerCharKeyCode: string;

  // option to specify the field in the objects to be used as the item label

  private labelKey:string = 'label';

      setCaretPosition(this.startNode, pos, this.iframe);

    }

    //console.log("keyHandler", this.startPos, pos, val, charPressed, event);

    if ((!this.triggerCharKeyCode && charPressed == this.triggerChar) || charPressedKeyCode == this.triggerCharKeyCode) {

    if (charPressed == this.triggerChar) {

      this.startPos = pos;

      this.startNode = (this.iframe ? this.iframe.contentWindow.getSelection() : window.getSelection()).anchorNode;

      this.stopSearch = false;