title: Intellij tool window "evaluate expression" can't be opened
body: <p>I'm using intellij 2020.3.2. On one session of my macos system, I can open the evaluate expression window, using the correct shortcut or cliking this :
  <a href="https://i.stack.imgur.com/dKy0w.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dKy0w.png" alt="Evaluate expression icon, centered" /></a>. And I can use my debugger with normal behavior.</p>
  <p>But I've got another session on the system (same project and seems to be same conditions), where it is impossible to open this tool window, whatever I test. I can debug, set a break point and see the value by &quot;quick evaluate&quot;, but the evaluate expression window cannot be opened.</p>
  <p>At this point I do not give more infos on the project cause I don't think it makes a diff...</p>
  <p>I tried in a first place with another empty project, I have the same behavior, so it is possible that it's a macos issue, I don't know.
  I also tried to reinstall the IDE on this second session, but it does the same.</p>
  <p>After I've done some unsuccessful search, I come here and directly ask if you have any idea?</p>