Rewrite task-list plugin

Task list plugin is third party lib with some known bugs and it depends on jQuery.

After some deliberation and a talk with @jschatz1 we decided it would be better to write our version of it with just vanilla javascript instead of a gem.

Open issues related to this lib: #22466 (closed) #22470 (closed) #3334 (moved) #2949 (moved) #21611 (moved) #18003 (moved) #21105 (moved)