title: Changing the style of "Actions" in material-table react
body: <p>I have been using material-table in one of my projects.</p>
  
  <p>While I am able to change the style ( font-size, color) of the user defined columns, I am not able to do so for the "Actions" column.</p>
  
  <p>I am specially interested in changing the font-size.</p>
  
  <p>Same issue with the pagenation: I need to change its font-size however it seems there is no option available.</p>
  
  <p>Please take an example from :</p>
  
  <p><a href="https://material-ui.com/components/tables/#complementary-projects" rel="noreferrer">https://material-ui.com/components/tables/#complementary-projects</a></p>