text: Title: Font size in plotly plot
  Body: The plotly plots on my macbook on Ubuntu 20.04 and pandasgui 0.2.3.2 have very tiny font. Wondering if there's a way to change this.. See pic below.
  
  ![PandasGui small font in plot](https://user-images.githubusercontent.com/51788468/93714956-15277500-fb34-11ea-96c8-21228bded784.png)
  