Re #6785. Hide all live data algorithm apart from StartLiveData.

As that's the only one that should be run directly (it calls the others).
Re #6785. Fix compiler warning that had made it into master.

Just remove unused variable from the method signature.
Also fix the spelling of the method name.
Re #6785. Move algorithms out of the General & Algorithms categories.
Re #6785. Move a lonely algorithm.

And change its version from 2 to 1, since there was no 1.
Re #6785. Create a category DataHandling\Isaw and move algorithms in.
refs #6785 Avoids merge conflict
Merge branch 'feature/6785_hide_live_algorithms', remote-tracking branch 'origin'