text: Title: Infinite horizontal scroll with fixed columns
  Body: See example in https://dash.plotly.com/datatable/width
  
  ![horizontal-scroll-regression](https://user-images.githubusercontent.com/1280389/84959064-7bbf7180-b0b3-11ea-9e60-b77236a5411e.gif)
  
  (Firefox)
  
  This is an issue in dash 1.12.0 & 1.13.0. Not sure about earlier versions.