title: React-admin : Remove or add a custom toolbar in SimpleForm
body: <p>How can I <strong>remove default toolbar</strong> and add a <strong>custom toolbar</strong> as per my requirements and not get the default Save button with Floppy Disk in <strong>SimpleForm</strong>? </p>
  
  <p>I am able to style the buttons and remove the icons on the toolbar but not able to proceed further as I am new to react-admin. </p>