text: Title: Label Text Wrapping with ellipsis leaves "..." after changing layout
  Body: When the layout is set to preset, and we set the `text-wrap` for `edge` elements to be `ellipsis`, the "..." stay visually, even when the layout is changed. Here's an example:
  ![capture](https://user-images.githubusercontent.com/21180505/44676008-1131d300-aa00-11e8-8c61-2dd2ba043118.PNG)
  
  When we change to grid layout:
  ![capture2](https://user-images.githubusercontent.com/21180505/44676052-2ad31a80-aa00-11e8-818c-f965afcf3b25.PNG)
  
  This issue is currently only happening in Dash. Reproduction in React.js will come soon.