Misc JavaScript improvements
- Currently "perform task" from JavaScript is asynchronous only and task results are unavailable. It would be good to the option of having a synchronous version which returns results as an additional option. Sure, it's not included now for a reason. But it would be good to have the option even if it would just fail when you e.g. run a task with another JavaScript action in it.
- Currently plugins are not usable. I can see this being basically impossible to address from within JS directly, so perhaps the first point is the best solution here.
- Update JS library to include all Tasker native actions.
