Improve debugging by running single action at a time

Currently we have the ability to manually run entire tasks. I use this to debug the task itself, before moving on to debugging the profile context, by adding strategic Flashes and Stops.

I think adding a full blown Debug mode like an IDE might be asking for too much, since Tasker is not an IDE, which means we still may continue to have to rely on Flashes to check variable contents. But if the Task is really long and we specifically want to Debug a specific part, it's super annoying having to run the entire Task many times while moving a Stop action around to locate a problem.

The ability to run a single action at a time (as like any IDE) would be immensly helpful to resolve this problem, making debugging way easier, and it shouldn't be too difficult to implement (correct me if I'm mistaken).