text: Title: [Duplicate] With fixed rows, columns are as wide as the data and not the headers
  Body: If the column headers are wider than the data (which is often the case with numerical tables & text column headers), then the width of the columns is too narrow and the column headers are cut off.
  
  Without fixed columns, the column width expands to account for the width of the headers. I would expect the behavior to be the same with fixed headers.
  
  Expected behavior:
  ![image](https://user-images.githubusercontent.com/1280389/79165955-0bd1f980-7d99-11ea-8a36-8d959b6eead2.png)
  
  Default behavior with `fixed_rows`
  ![image](https://user-images.githubusercontent.com/1280389/79165971-168c8e80-7d99-11ea-9492-94ea7e3804ea.png)
  
  Still undesirable behavior with header overflow:
  ![image](https://user-images.githubusercontent.com/1280389/79166008-286e3180-7d99-11ea-8474-ad5f1eb078c5.png)