[wdspec] Tests for "input.performActions" to check that dispatching actions finishes even with an active navigation.
Tests for "input.releaseActions" cannot be created
because there is no way to delay processing certain
actions from the action chain.
Differential Revision: https://phabricator.services.mozilla.com/D227238
bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1921314
gecko-commit: 6fb4c720d55414bf4df7e8eee44c01f654d430c3
gecko-reviewers: webdriver-reviewers, jgraham, jdescottes