Bug 1824109 - [devtools] Make sure the paused task is resumed before exiting...

Bug 1824109 - [devtools] Make sure the paused task is resumed before exiting r=devtools-reviewers,nchevobbe a=test-only

Differential Revision: https://phabricator.services.mozilla.com/D207088

devtools/client/debugger/test/mochitest/browser_dbg-call-stack.js

@@ -19,6 +19,8 @@ add_task(async function () {
 
   const button = toggleButton(dbg);
   ok(!button, "toggle button shouldn't be there");
+
+  await resume(dbg);
 });
 
 add_task(async function () {