patch 8.2.4228: no tests for clicking in the GUI tabline Commit: https://github.com/vim/vim/commit/b0ad2d92fd19e673ddbbc66742bae3f71778efde Author: Yegappan Lakshmanan <yegappan@yahoo.com> Date: Thu Jan 27 13:16:59 2022 +0000 patch 8.2.4228: no tests for clicking in the GUI tabline Problem: No tests for clicking in the GUI tabline. Solution: Add test functions to generate the events. Add tests using the functions. (Yegappan Lakshmanan, closes #9638)