title: Intellij undo history size, not much?
body: <p>I like to be able to undo basically several hours of work in a file. I am unsure how to configure this. </p>
  
  <p>In IntelliJ settings, the clipboard settings I have tried with are 999 and 9999 and 99999 but it still too short on undos. </p>
  
  <p>How can I increase this? </p>